From videos I have seen, most tanks, especially on solo tank runs, are using hallowed ground right before they pull the 4 and 5 snakes on T5, and these runs ended up being successful. I have read a few places that you should save hallowed for the hatch phase, in case the MT is targeted by 5 liquid hells.

Can someone explain this in detail? I dont understand why I cannot just move myself and Twin out of the liquid hell spots. The major confusion comes from a strat I read that said "save HG in case you get the liquid hells, if u do, pop it, then rotate Twin just barely out of the liquid hells". I am guessing that the 5 LH will make me take considerable damage, and if Twin does an auto attack, plummet, or DS, I am def going to wipe. So couldnt the healers give me stoneskin and aldo, while I pop sentinel and some other random CD, and that would be enough to mitigate the initial LH damage, then whatever attack follows?

Im just thinking that its a guarantee that I will have to tank the 5 snakes, but not everytime will I get targeted by the 5 LH, so the odds are in favor of me using HG on the snake phase. Or would a cooldown stack of sentinel, rampart, and convalescence suffice during the snake phase? Thx