For a conk your native crowd control is Batter Aside (twohander) and Overwhelm (dual wield.)
If you are brute-specced you should pick up Burst of Aggression (aoe knockback, refreshable on kills if you get Remorseless Agression) and Throat Slash. Throat Slash is an interrupt featable to be a silence as well, and works on melee and spell abilities.
Also if you doubletap forward, your melee attacks have a chance to stun.