Pooled Hatred/Gather Strength is pretty much a waste of a utility point for Vig/Veng because the buff is comsumed by DoT ticks.
On tier 1 I use CD reduction on leap, pull/knockback immunity on leap, root breaker on Focus/Enrage, and immobilize on Ravage/Master Strike. On tier 2 I use CD reduction on Choke/Stasis. On tier 3 I use +2 secs on Reflect + interrupt reset and root breaker on Mad Dash/Blade Blitz