Was feeling frisky and decided to attempt to get the Doom Slayer achievement (Defeat the final boss with all demon spawners alive and Badder Bosses challenge enabled).
Been attempting it for a week or so and rarely make it past the 1st boss (I've gotten too used to fighting normal bosses - these challenge bosses keep hanging me up).
Mis-fired a caustic potion at Yog while one of the fists was still up. If I hadn't wasted that potion, I'm pretty sure I would've won this fight.
First time actually making it to the final boss fight with Badder Bosses on, so I feel really accomplished to have made it this close.
Edit:
A week and half a dozen tries later, finally made it!
And with TWO challenges on (ran with Swarm Intelligence on as well).
(Please ignore how much of a one trick pony I am)
The two big ones are:
The Complete Noob’s Guide is a bit out of date (does not have Duelist, never mind Cleric). If there’s a more updated version I’m not aware of it. However a lot of its info is nearly universal across versions, in particular all the stuff about consumables, wands, movement speeds, attack speeds, angles for ranged attacks, line of sight, monster AI, and how to deal with each enemy type and boss in a generic way. I think the alchemy info is also out of date, and of course there’s no info on trinkets either.
The Wiki is a much better resource for up to date info on the game. However it is not nearly as complete in terms of strategic info, so having both the CNG and the Wiki are advisable. And of course the in-game journal and character info from the new game screen is always going to be the most reliable and accurate information, albeit with the least amount of strategic info.