I will focus on preparation more than on the fight itself . It is extremely useful to familiarize yourself with crafting recipies, here are few potions: - potion of healing + 2 seeds = instant shield when you can't afford to wait for the heal - potion of corosive gas + 2 seeds = around 50 turns of physical damage reduction - previous potion + ooze from 1st boss = magical damage reduction

Upgraded scrolls can also be useful: -mirror image + 2 runes = summons weaker version of yourself, which can easily tank a fist for you -scroll of reachrging + 2 runes = scroll that can recharge artifacts -scroll of lullaby + 2 runes = charmes all mobs around you for about 20 turns

Spells: -scroll of polymorph + catalizator = 8 times a consumable reroll spell- I usually use it to reroll bad potions, preferably into healing pots -potion of flying + catalizator = 2 times no damage while falling down spell- can let you skip last floors, without loosing health

Upgraded bombs- haven't tried them much, but bomb + freezing potion gives 5x5 freezing that last few turns which is much more reliable than a potion .

There are many more, which I forgot, are rare or more situational, anyway if you have a lot of healing potions you should be fine :D