playing Dungeons on high Difficulty

[Anhra]

I think you should consider not using food. Content is tuned with the assumption you are not using food, so just using it can cause you to survive a tank buster without mitigation in my experience.

Food and Potions are allowed in this set of Rules, because their usage (and the arcanist class) compensate a little for the missing Healer, and even then it hardly makes any difference.