Actually I returned to the game last month so have little no experience with him. I tried with Havok but its crush is still pain. My game style has always been reparry and then combo.
Cleanse effects can remove his crush with no side effects
Cleanse effects can remove his crush with no side effects Sure minus the part about making passives out of debuffs that are purified or cleansed.
No one kills Onslaught faster than Havok. The best counter and takes almost minimal energy damage.