I only tried it once (well, when Raha told me that I could get Garrison’s Battle Burst in the arena) and only reached a few points below 200.
I think I went with Cali (heal), Gully (tank), Garrison (dmg).
Atm I’m looking for gear in The Dig and tinkering with the perks.
I went in with this squad as well.
Manage to get 425 points and i am wondering it this was fixed points?
I wonder if time spend has any difference on the points or is it a one time thing?
Time definitely factors in.
I have been to the arena twice since then and on my second try I managed something around 420 and currently I have 444.
My record is 456 with Gully, Bretto and Garrison.