Also to keep the long comment going. Don't take abilities that give you short term buffs. Waste of mana and its barely noticeable. Just buff what you have and take things that give more mana/health as those are more permanent. And be sure to use mana and health potions to give you more stats! It's a trap to use them as actual potions unless in a desperate situation. 9/10 its better to take the permanent +4 from the health potion and the permanent +3 from mana potions. REMEMBER, they only give you those buffs if you use them when either your health is full for the health potion or your mana is full for the mana potion.
@archerbob, move around when using stairs so one or two follow. Then use mushrooms on previous floors. You should have already cleared the floor so go to helpful things. Stealth only works if you max for it and if you have sleep dart. Hit and run until dart is back up. Stealth is more of crit than actual stealth. Do use the map. Pretty much any terrain gives you and the enemy the unstable status. Whoever is unstable gets free crtits. Make enemies follow you to where they are standing on something that makes them unstable. BAM. Free crit. Remember though, max one stat only. The game is tilted to that. If you're not maxing one thing you'll lose. Ability wise, focus 2 or 3 things if possible. Better dmg output that way. Oh yeah, Evasion OP. I hope that helps! I've maxed every achievement in this version of the game and before the recent wipe and was sitting at around a 55% win rate with like 100ish runs. So it's very possible when you learn the tricks! https://imgur.com/QaVwskx
@archerbob use the environment, corners and stairs to your advantage. Also, I only ever focus the stat most associated with what I'm playing, e.g. Archer only range, mages (magic), rouge (stealth). Trying to balance stats is a bad idea. Bu the biggest thing is using the map to your advantage.