GMST Class Testing

You mean seeing if DoTs work on bosses at all? Because they do, I tried Inferno and Flamethrower/Grenade on Headless Horseman yesterday (and not only do they work, they also stack) and I believe someone tested ice DoTs on Biogfoot.

What I would like to know in regards to that, though, is do they stack if two different people use a DoT attack on one boss/mob?

EDIT: I think I misinterpreted the question, ignore my answer if so. XD

Status ailments are abnormal conditions such as freezing, poison (though poison belong to the DoT category in this game), seal, blind, slow, etc..