Update:
I've taken 1 several times with the reworked GMYoda.
GMYoda
Anakin
Ezra
GK
HYoda
It can still lose to Traya teams but I win WAY more than I lose. I have to have less than average RNG to lose, matter of fact.
Just get you HYoda and GMYoda speed up around 260+ and you should be good (of course that's based on your enemies). I regularly get Anakin to hit 25k+ on his basic, and so far, I've gotten his AOE to hit EVERYONE for 39k.
So yeah, the rework is epic on offense in Arena.
Also, getting those Jedi up to Gear 12/12.5 does work in the hSith Raid. I've only used them in P2 but I got over a million damage. Not fantastic but definitely worthwhile.