So while I dont think food/potion for thralls or you would be necessary for ANY other content on the map it might have been necessary for arena champion. I did run +follower damage food/potion on myself and strength food/potion on the berserker. This is a no authority build wearing skelos cultist armor.

https://youtu.be/RFe5e-yNCAo

edit: everything else in the dungeon was cake, took 15-20 seconds more per boss, maybe took 20-25% damage.