In Torghast, Dreamspun Mushrooms increase the duration of Wrathful Faerie by 60%, possibly stacking multiple times. Right now the duration of Wrathful Faerie is set by a hardcoded value. Need to pull Anima Power information or deduce this from one of the buffs on the player instead.

Need to find out if Wrathful Faerie Fermata is affected as well.

Anima Power abilities in Torghast get added via a hidden buff whose only trace is a combatlog event:
12/1 01:41:28.111 SPELL_AURA_APPLIED,Player-3725-0B3E0FB1,"Twintop-Frostmourne",0x511,0x0,Player-3725-0B3E0FB1,"Twintop-Frostmourne",0x511,0x0,342409,"Dreamspun Mushrooms",0x1,BUFF

Need to track when this occurs and have it's value factor in.

Need to add zone detection to the bar to clear Dreamspun Mushrooms' effect when leaving Torghast.

Doing more digging, you can access Maw buffs from the API. Sneaky Blizzard!
local _, icon, count, _, _, _, _, _, _, spellID = UnitAura("player", i, "MAW");
From: https://www.townlong-yak.com/framexml/live/Blizzard_MawBuffs/Blizzard_MawBuffs.lua#30