The only way to win is to make the most broken team you can think of. I'm just a beginner at this game, but the best strategy I can think of is make a team of champions with Attack All options and level the hell out of them.

Seeing what you have: Keal, Elhain, Shaman, and Apothecary.

Give Keal and Elhain Divine Speed armor.

Shaman Defense armor and Ascend to 3* to use her Recall.

Apothecary Lifesteal armor for his Soothing Chant and Boon Of Speed.

The plan is to have Keal and Elhain to use Acid Rain and Lightning Arrow to kill the opposing team before they have a chance to counter attack. Shaman will reanimate whoever gets killed and Apothecary will use Boon Of Speed to get Keal and Elhain to attack again as fast as possible. I know Elhain has a second All Attack and should be able to clean up the left overs.

I did see this one team that totally destroyed me with Shaman and another champion I can't recall the name of. What that champion did was drop a ton of buffs on their team with one being not being able to kill (deal damage to?) them for 2-3 turns when at zero health. I wish I saved his name, but he looked like a black knight. I killed his Apothecary, but Shaman brought him back only for his champion to drop this wall on his whole team, that I couldn't get through.

The only way to win is to make the most broken team you can think of. I'm just a beginner at this game, but the best strategy I can think of is make a team of champions with Attack All options and level the hell out of them.

Seeing what you have: Keal, Elhain, Shaman, and Apothecary.

Give Keal and Elhain Divine Speed armor.

Shaman Defense armor and Ascend to 3* to use her Recall.

Apothecary Lifesteal armor for his Soothing Chant and Boon Of Speed.

The plan is to have Keal and Elhain to use Acid Rain and Lightning Arrow to kill the opposing team before they have a chance to counter attack. Shaman will reanimate whoever gets killed and Apothecary will use Boon Of Speed to get Keal and Elhain to attack again as fast as possible. I know Elhain has a second All Attack and should be able to clean up the left overs.

I did see this one team that totally destroyed me with Shaman and another champion I can't recall the name of. What that champion did was drop a ton of buffs on their team with one being not being able to kill (deal damage to?) them for 2-3 turns when at zero health. I wish I saved his name, but he looked like a black knight. I killed his Apothecary, but Shaman brought him back only for his champion to drop this wall on his whole team, that I couldn't get through.

Using teams like this, even if they could beat your actual champs, is a reason why so many players are stuck in Bronze. This team composition is bulls***t! A nuker team without def debuff, don't use a team like this and please don't recommend something like this to other players. And Apothecary in lifesteal? Definetly not!

My team suggestion for a speedteam would be something like: 

High Khatun (teamleader for speedaura)

Seeker (speedbuff and Atk buff with the same move)

Dhukk the pierced (Def debuff, Atk debuff on the same move, nice if any opponent survives your hit)

Kael (AoE Damage)

/edit: Nice to see that trips suggestion fits exactly with the heros I mentioned.