Aside from provideing admittedly useful resistances to Burn, Poision damage and Sleep, why is it that Poision Heal Gliscor is seen as superior to the traditional Roost Gliscor?
It takes NINE TURNS for Poision Heal to outdo a single roost with Leftovers held by the Roosting Gliscor, with Poision Heal granting 108% during that time, and Roost+Lefties granting 104%.
A Gliscor with only Roost [It might be an offensive Gliscor with no item for Acrobatics] gets enough HP back for it to take Poision Heal 5 turns to overtake.
Both types of Gliscor 'waste' a moveslot, Roost and Protect, respectivly.
However, Roost Gliscor, unlike Poision Heal, is a bit more unpredictable, and can also run offensive sets better, or taking sets with defensive EV's, but Swords Dance, Acrobatics, and Earthquake so it's not setup fodder.
I just wonder why every single Gliscor seems to be Poision Heal these days... if you're so worried about status, you could always absorb damageing status with something like Renkulus anyway.
Not to mention not any of the things Gliscor fights use status. The extra healing is probobly better against stuff like Conkledurr, although Roosting against Excadrill is admittedly suicide, it'll allow Gliscor to recover better after Excadrill is finished...