Max level Maw phasing is not a bug so it will not be ‘fixed’, it is Working as Intended™
That said, on topic to the OP even though it has been necroed twice now, the buffs obtainable in that area mentioned by Kittredge are no joke, they are very strong damage (floating weapons) and survival (runes) buffs that dramatically increase ones damage or survivability, so making sure to use them makes a very large difference.