When me, a lvl 20 assassin swings at a lvl 24+ PvE monster, I end up doing, jack$#!+ damage. [in relation to their hp bar]. Sometimes, vs. squishies, they do die relatively fast but if I'm fighting high armor casters [think Dwarves or what not], I can't seem to slam them past 20% hp bar...
I want to see how badly Glint will eat me, that'd be an interesting sight to see...

What my question is, since Crits are affected by character level, and to a lesser extent AL, how do you sins get any 'worthwhile' spikes on high level foes? [worthwhile being 50%+ total hp bar damage]
My experience with it has me wishing to go back to my W/N, but I believe I've found a fun, though slower, way for my sin to slam a foe into the dirt via Deadly Arts...
So, what tips you got on using a high level sin to do high level worthy damage? [using Dagger Mastery + Critical Strikes]