Who is the king of damage dealers in Arena?

Of course the damage they deal in the end depends on your gear. I'm sure a Platinum player could make his Kael hit as hard as my Zavia because of his better gear. So I compare only the basedamage of the champs. I will take atk and def buffs into account, because that is the big disadvantage hp-based nukers have (no buff to increase their damage), it's to easy to obtain an atk buff to overlook these buffs. On the other hand, hp based damage dealers have high survivability and their damage is not decreased from debuffs.

Some champs deal their big damage only if a certain condition is fulfilled (like Ruel, double hit only to enemies under Hex). I will write these conditions down, for a better comparision of the champs. Of course dealing the same damage without any condition is better than dealing damage, if...

I'm not taking single target damage dealers into account (maybe later in a separate post) and no damage that is to complicated to compare, so I'm not going to calculate the average champs hp for this thread to compare damage that is based on enemy max hp (no Septimus or Seer in this list). 

The damage multipliers are taken from Ayumi.

If there is any champ I overlooked, feel free to add.

Sicia Flametongue

Demonspawn, legendary, atk based, conditional damage (condition: 2 attacks in a row via extra turn if A3 places hp-burn debuff on all enemies, debuff chance booked 100%. Block buffs, resistance or other stuff may still prevent them from landing, further: passive skill increases damage by 3% for every hp-burn on any champ, her A3 places hp-burn on herself and all enemies)

Atk 1586, multiplier A3: 3.5, books +20%, 

A3 damage: 1586 x 3.5 x 1.2 = 6661.2, atk buffed 9991.8. If she lands all debuffs: extra turn.

Multiplier A2: 3.7, books +15%, activates hp burn, benefits from passive skill

A2 damage: 1586 x 3.7 x 1.15 x 1.15 = 7760.69, atk buffed 11641.04

A2 + A3 = 21632.84. 

Activated hp-burn 🔥 from A2 not even in the calculation, because it's based on enemy max hp and I don't know how to bring that into the calculation.  

Hephrak

Demonspawn, magic, attack based, ignores 15% of targets def, conditional damage (condition: double hit, if enemy is below 50% hp after first hit), special: can activate this attack with passive, if allie dies

Atk 1553, multiplier A2 3.6, books +20%, double hit (conditional)

Single hit: 1553 x 3.6 x 1.2 = 6708.96, atk buffed 10063.44, double hit 20126,88.

Ruel the Huntmaster

Dark Elf, spirit, legendary, atk based, conditional damage (condition: targets under Hex debuff, if so, double hit). Special: Ignores 25% of targets def, if 4 enemies are under Hex.

Atk 1696, multiplier A2: 3, books +30%, double hit if target under Hex. If not, his damage is not even worth mentioning in this list. No Hex, no damage.

1696 x 3 x 1.3 x 2 = 13228.8, atk buffed 19843.2  

Leorius

Skinwalkers, void, atk based, conditional damage (condition: damage increased 1% for every 1% of hp lost). Condition can be obtained from his passive: Instantly places an [Unkillable] buff on this Champion for 1 turn before receiving a fatal hit. Special: can place weaken (booked 100% chance) before he attacks. 

Atk 1409, multiplier 3.85, books +20%

Normal hit 1409 x 3.85 x 1.2 = 6509.58, atk buffed 9764.37

Hit with 1 hp left (unkillable) 1409 x 3.85 x 1.2 x 1.99 = 12954.06, atk buffed 19431.09 

If you have a team that gives him an atk buff and his condition of low hp at the same time is up to you, just theory crafting here. 

Robar

Orcs, force, legendary, atk based, conditional damage (condition: enemy under one of the following debuffs: fear, true fear, freeze, stun, provoke, sleep). Has a 50% chance to place stun with his single target A1 and gets an extra turn if doing so - not in calculation, because only 50% chance, I'm not going to calculate an average damage from his A1 for the chance to land 4 stuns in a row before using his A3 skill. Realism first!

Atk 1619, multiplier A3 4.2, books +25%, damage from condition + 50%

Without condition: 1619 x 4.2 x 1.25 = 8499.75, atk buffed 12749.625

With condition 1619 x 4.2 x 1,25 x 1.5 = 12749.625, atk buffed 19124.44 

Trunda Giltmallet

Dwarf, magic, legendary, atk based. Kind of condition: targets shall not have stun debuff (what her attack could place), otherwise you don't get a double hit. So build her with low acc. Dead enemies are better than stunned enemies.

Atk 1608, damage multiplier A3: 3, books +30%, double hit unless enemy is under stun

1608 x 3 x 1.3 x 2= 12542, atk buffed 18813.6. 

No stun on the target is not really a condition, as it's so easy to fulfill, so she gets the same just-damage-sign as Karato Foxhunter. 💪

Rae

Dark Elf, magic, legendary, atk based, conditional damage (condition: targets under any debuff, easy to obtain).

Atk 1343, multiplier A2: 4.3, books + 30%, condition: +50%

1343 x 4.3 x 1.3 x 1.5 = 11261.06, atk buffed 16891.58 

Lord Shazar

Demonspawn, spirit, legendary, attack based, conditional damage (condition: bombs that detonate after 1 turn, if placing hit is critical, otherwise after 2 turns), special: can buff himself with 50% atk and gets an extra turn after doing so.

Atk 1343, multiplier 3.2, bomb multiplier 3.2, books +25%

Hit damage 1343 x 3.2 x 1.25 = 5372, atk buffed 8058. Bomb damage (atk buffed) 8058. Total 16116. 

Soulless

Knights Revenant, void, legendary, def based, conditional damage (condition: damage increases 10% for each debuff on the target). Special: Provoke on all enemies, shield for himself with this attack.

Def 1421, multiplier A3: 4.9, books +10%.

1421 x 4.9 x 1.1 = 7659.19, def buffed 12254.70

If target has 1 debuff 13810.17, if 3 debuffs 15931.11, if 10 debuffs 24.509.4.

Wide spectrum for Soulless, according to the number of potential debuffs. I don't think 10 debuffs are realistic in arena, so I listed him arbitrarily according to the number of 3 debuffs. If 10 debuffs are on the target, he is the no. 1 champ.

Candraphon 

Demonspawn, force, legendary, atk based, conditional damage (condition: attacking under Veil or Perfect Veil, easy to obtain, passive that gives the needed buff, when enemies tm is increased and active skill to put Veil on himself)

Atk 1509, multiplier A2 3.7, books: +20%, condition: +40%

1509 x 3.7 x 1.2 x 1.4 = 9379.944, atk buffed: 14069.916

Ragash

Skinwalker, spirit, def based, conditional damage (condition + 20% damage if def is higher than target's def, easy to obtain for a def based champ with high base def). Special: Can land decrease def before attacking and stun after the attack, chances to land booked 100%.

Question: does decrease def debuff or def buff count for his damage condition?

Def 1443, multiplier A2: 4.3, books +10%.

1443 x 4.3 x 1.1 x 1.2 = 8190.47, def buffed 13104.75 

Karato Foxhunter

Shadowkin, legendary, spirit, atk based, special: can block active skills.

Atk 1564, multiplier A3: 4.5, books +20%

1564 x 645 x 1.2 = 8445.6, atk buffed 12668.4.  

Magnarr

Demonspawn, spirit, epic, hp based

Hp 20970, multiplier A2: 0.22, double hit (unless enemy is under hp-burn), books: +30%

20970 x 0.22 x 1.3 x 2 = 11994.84. 

Less than I thought, but be aware that I calculated atk (or def) buffs on all other champs, you have to bring that buff really in your team before you get the incredible damage numbers for them. 

Abbess

Sacred Order, force, legendary, atk based. Special Can place decrease def before attacking (chance to land booked 100%).

Further worth mentioning: she has another hard hitting AoE skill, that is based either on her attack or the enemies attack or def (from the highest stat of these). If based on her attack, it's weaker than the calculated skill (lower multiplier). If based on enemy stats, it gets even some extra effects, but impossible to calculate here, wich target enemy should I take?

So only looking at her A2 skill here.

1564 atk, multiplier A2: 5.1, no damage from books.

1564 x 5.1 = 7976.4, atk buffed 11964.66 

Baron

Banner lords, void, legendary, attack based, special: secret skill Skypiercer ignores 50% of target's def, shield and block damage. 

Atk 1575, multiplier Skypiercer 4.3.

1575 x 4.3 = 6772.5, atk buffed 10158.75. Not the base damage makes this skill good, but the effect of ignoring def/shields/block damage.

Mortu-Macaab

Demonspawn, spirit, legendary, attack and hp based, special: his AoE attack is not his best move, the champ is best knwon for his single target secret skill Peril with included block revive effect.

Hp 23120, atk 1145, multiplier A2: 1.1 x atk + 0.1 x hp, double hit, books +20%

1145 x 1.1 + 23120 x 0.1 x 1.2 x 2 = 8571,6, atk buffed 10083

That list is far away from beeing complete. But sitting on this post much longer than I initially planned, I didn't want to add damage dealers where I could see immediately from their atk stat and multiplier that they won't reach the top (like Foli), so I stopped. Between the first place on this list Sicia and Mortu-Macaab will be a lot of other damage dealers.

Did I miss somebody who could get in the top ranks?

/edit: Added some more champs.