The snare spell always hits, except when it doesn’t.
You just have to know how to use it. 
where the hell is it
This is a certified grab hitbox moment
have you tried turning your wizard off and turning him on again?
Grab hit boxes tend to be a bit more reliable in combat from my experience
can confirm but also that makes ABSOLUTELY NO SENSE.
least jank grab hitbox in AO:
I have 75 attack size and hit only like 2/10 times
snare against npcs is super fucking weird, maybe its because of them randomly blocking??
I’ve found that snare only works against npcs when they are aggroed on you. Try attacking the guard first before using snare