Talon Spam for full Melee Characters (using melee weapons therefore stamina, and probably heavy armor) is just a spammable hard counter for any non full melee DK. The same for any other rooting abilit
all of those are stamina abilities. Immovable potions don't grant root immunity only CC. The only option a magicka user has is mist form which forces you into being a vampire
I even went to gather some slam-npcs, and as soon as incoming slams surpass the number of 3 you get chain-stunned no matter what (block, dodge, breakfree, immunity)