FINALLY! PRAISE THE DARK LORD!
I finally made it, fuck Priscilla, fuck her tail, it's mine. Platinum baybay!
I must say, this is the first platinum I have that I'm really really proud of, that was the most frustrating fun I had since (S)NES times.
As for Bed of Chaos aka broken pile of shit:
If you already have the two crystal things destroyed (and the floor broke away infront of her) the easiest way is Havel's Shield and nothing else (unless you have enough endurance to wear more).
Jump down, when you land use the shield reinforcement, gives you exact amount of time to bypass her first swing, then run almost straigth for the hole, just slightly to the right (one or two steps) and jump down. all this with shield up ´just in case. you should land right between her fire breath crap, and then you can just casually roll through the branches and one hit punch her to hell