The RPG is broken for arena - Need counter ideas!

I have never commented on the outrageously rigged RPG of credit heist, or shard packs, or zeta event. But for the past 3 days whenever I have attacked a zMaul team with EP, 5/5 of my characters are stunned and dazed EVERY time, when it should only be a 70% chance for each, and my tenacity should block at least something. I run a zCLS Leia zR2 Wiggs when they are ALL dazed every single time. It makes it very tough to beat this annoying old meta when my team, based on counter attacks and bonus TM and assists. Every single time. I never have such luck when I run EP. Ever. I can use him in 10/12 GW nodes and not once stun every opponent