Replace shikamaru with sarutobi(normal 1) if you have him I've tried that team with iruka and shika as well but in the end i decided to use saru who works way better then both of them and it'll seem that he's easy to intruppt and stuff which is not many players thinks that after he dies he just mysteries which is not the case you can choose when to use reper death seal so you can just wait Kushina is mostly for life battles and with saru you get a upper hand since he does like 22k damage(if you power is like 200k) i have 300k and mine does 27k on pos3 31k with crit

yeah edo itachi+kushina is a great mix +if you have high control on itachi you can control other immune ninjas for 2 rounds after removing immunity it works pretty good in arena