If a class has a knock back don't open with leap. Run up Battering Assault>Use your snare(crush, rupture, crippling slash)>build rage while waiting for KB> get KB'ed> leap > drop damage into them?
For carnage you want to gore>ravage>scream (try to be full resolved for this) or gore>massacre x3>scream. Basically build rage> dump rage to blow people up. Use your rage to root as needed, massacre spam, and screams.
Smash, build four stacks of shock wave, leap to a group, smash. <easy.