Root spell line plus DoTs

[blackdragonsdg]

Actually I think root spells have atleast a tiny chance to break from any source of damage but like you said initial dot damage, nukes of any type and melee/bow damage will break the root spell more times than not. Root is also random duration or modified random up to its max depending on what spell you are using so that alone will make it hard to tell what is normal breakage or breakage due to a bug.