NPC Pet spells landing 100%

[Rygar]

I'm not entirely sure, but I think earth elementals cast a different root than the normal spell casting root seen by players and normal NPCs. Something like ElementalRoot?

Its plausible if this is true that perhaps some npc pets are using a spell that is flagged unresistable or extremely high -MR check.

OP seems to be talking about a level 17 NPC earth pet always landing root on a level 57 player. I imagine this is not correct or maybe evidence exists that elemental pet roots were unresistable.

OP: suggest posting a log snippet of just letting this pet melee you and showing the successful root or resist messages. Just afk for 5 mins or something.