For the last arena my stats are:
Min Attack Damage 143480 health
Biggest Attack 9,306,415 damage
As my Min Attack Damage is 1.5% of my Biggest Attack, I think the Biggest Attack damage is pure luck or total randomness.
Just make sure you are using your highest attack loadout when the Arena starts, stay alive until you unlock the 2x XP, 6x Strength in battles and hope for the best.
Last edited by a moderator: Jan 20, 2016