The Beginning Abyss
Note: Certain floors have randomly generated tiles, so your map will not match 100% of the map I posted, beware of that. I might add some small hints on the side and some comments here and there, I hope you can find this to be useful.
BF1 - Not much to say, first floor, welcome. On second playthrough, make sure to talk to christ to unlock a bondmate quest, he's the elf on the left side deadend when you first enter.
BF2 - You will fight your real first boss here. Not much to say, use your harken afterwards. Only important thing of note is the room to the right has an infinite respawn mob that you can grind on early level.
BF3 -You can continue your through until the story makes you examine the rocks. Examine it enough times and you can reverse time and proceed. Make sure you reverse time and finds the cause of death of your friends. There's a camp where it restores all your hp/mp, it will be restored everytime you exit and enter the labrynnth. The Goblin's nest is not worth doing, leave it.
BF4 - First time here? You got to watch your friends die. Second time here? Read the true ending guide! This is the first time the game shows you raising a stone will lower and raise certain paths, that's really it.
BF5 - The top left side will be a warped one's nest in the beginning of the map, I don't suggest going there unless you're prepared, not much there. The Larger rectangular area will have a boss for you, prepare accordingly. Also, check this map to avoid the poison tile paths.
BF6 - The beginning fork may varied; don't bother opening the wrong door where the corpse tells you; it's just spikes. I believed correct warp order is up, then right. (correct me if I'm wrong please). Statue room puzzle answer is on discord faqs. Saint shield quest also complete here; do second warp wrong, fight mob.
BF7 - You will need to go through the poison floors everytime UNLESS you reverse the stone on the next floors, which creates the shortcut. Make sure to do that. Albano will REALLY not like you here, unless YOU DO something correctly. (second playthrough only) The camp here is important as you can't access the Harken next floor until you beat the final boss.
BF8 - No, you must kill the boss to reach the harken. Yes, there are mimics now. They hurt, but good news, defend their p atk and gives you a big opening for massive damage. Good luck on boss, and hope your head won't fly. (It will if this will be your first playthrough)