Pistol shot: spammable range snare
Declarable annathema: self punt and stuns any melee hitting you
Expurgation: M4 aoe snare (probably rarely gets used)
(Technically not "crowd control" abilities but people tend to lump these in with them)
Confess: single target disarm
Silence the heretic: single target silence
I don't play witchhunter.