What kind of teams do you have an easy time with? What kind do you have a difficult time with or skip altogether? 

Can you show us the builds of your current team?

Farm bots.  Otherwise classic is just gear.  Farm dragon for speed.  I set solo defense in classic, but if you need I would use valk for sure.  Arbiter Yoshi Valk Rotos.

Well, i just want a team that can deal with,,, maybe half of the opponents at goldIV

Im not sure who´s my guys,,, neither in defence, nor in offense. Arena is the part of gamge where im really falling behind. I hear good about a guy like Vogoth - Valkyrie is excellent too, Arbiter ofc,,, Rotos and skullcrown are great,,, but im not sure who to pair, and whos mainly defence/offense  

You have a ton of options.

1) Blender team. Arbiter (300+ spd) + Longbeard (speed tuned for no cut-in) + Skullcrown + Bellower. Bellower is sub-optimal here. If you have a Sinesha or another Skullcrown lurking somewhere, they're better.

2) Speed nuke team. Arbiter (300+ spd) + Archmage (speed tuned for no cut-in) + Ninja (speed tuned for no cut-in, fully booked A3, high acc) + Bloodgorged.

3) DEF/RES team. Rhazin + Sinesha + MM (shield set) + Rotos (HP gear instead of ATK, since he scales on HP as well), all running 350+ RES., all except MM running freeze sets

I'm sure there are others, but those are the ones that leap out.

how can you ignore the valkyru!??!

 it's a sin not using her in Arena.

For Arena use: rotos, scyl, VALKYRA, ninja, skullcrow.. 

u've have brutal champions for arena, work them...

if i had those ur champions would be in platinum, 

i have only zavia and robar always in Gold IV half way until platinum...

I didn't know the arena bots posted on the forums. I makes it more believable they are real teams.

That's ... an absolutely awful team. There is virtually no syngery between those whatsoever.

it's just advice which champs to use for arena, 

not to put them in same team... 

lol

i dont kn0w ur meaning with this kinda replay? oO

Arbiter

Psylar

Skullcrown

Valk

That would be a great nuke team with valk to protect a little if you struggle. You could replace valk with rotos if you wanna pick off a few. 

I highly suggest choosing about 7-10 champions to swap and not stick with just 4 or 5. Allow you're teams to work together, buff each other, speed tune, and survive. 

Hope this helps a little

Nice suggestions. I really like your suggestion 2 (havent longbeard for suggestion 1). I hope it will work with rotos as a start instead of bloodgorged :)

Ty for the advise

Gosh there are so many good options in that roster!

There are a tonne of combos that would work and i would swap champs in as suitable, but personally

I would have arbiter (speed boost and turn meter) and valk (screw up opponent turn meter and turn a lost game into winnable) in the defence team 9/10 times. Maybe with psylar or seeker for double turn meter manipulation and skullcrown to nuke (she is annoying as well).

But if you just wanted to speed farm the weak teams (offence) it might be simpler to use a traditional speed nuke team

For speed farming i just pick on the teams that dont have hedge or tormin. and whos level suggests they havent done a lot of dragon grinding

I run a double turn meter if they have an arbiter lead. If they have a go second team i will run a single turn meter and two nukers. If there is a skull crown ill either run somone to remove/block the buff or someone to tank the hit. In offence i think- change your team in and out depending on who you are fighting....and pick on the bots.

Have  you  considered using  Golden  Reaper?

actually havent - but she could work instead of psylar ?

1st : get speed above 300 for all champs somehow

after that be creative, I see people who use a provoke/unkillable champ or a block revive champ or revive combined with fear/true fear champ. 

all sorts of combinations, but speed remains the key

Yeah  -  Psylar  is  great  hero,  but  in  this  situation I  would  go   with  Golden  Reaper.