Trials

I play a melee build based on stuns to clear packs of monsters, I can do any map map without having any difficulty regarding clearing, did over 70% more life, 25% life as extra ES , increased stun threshold ,etc.

My problem is that every time we tried to do a run for the trial master I was unable to stun monsters even with the most stun buildup I could possibly put into my leap slam, basically I was useless besides bosses and my other party members were in charge of clearing, this doesn't make any sense for me and is happened to every single run we had(did over 6-7).

I am using overpowered on my leap slam , but because they're not prone to stuns I can't finished them with boneshatter, it's and a dps problem or lack of stun buildup it only happens in trials.