I'm going with "other"
I agree with ginyu in the case of instant direct CC.
I personally dislike direct CC as this as in-element with Bone Wall.
I am not used to this hybrid stuff, but Air casting cost and Death ability cost might work well.
I propose to simply give it a standard weapon attack (3 damage for the attack might be a bit low for the cost though) and make its ability inflict poison only.
E.g. It can poison a player or creature (or perhaps just creatures) with its ability and does 3 damage per turn.
Giving
snipe + poison on top is a bit too much I think and there isn't a big need for an owl's eye clone anyway.
to be clear, I don't have a problem with poison based CC being in element with bonewall, but instant CC is a little too potent.
The reason being, that poison gives your opponent a chance to respond to the threat of adding extra bonewall counters. Instant direct CC like owl's eye does not.
Its a fine point, but an important one.