I play a Marauder on Helm Of Graush, 2/8/31 spec, and I have little issues hitting 5k damage on someone, but only if I pop my adrenal / relic. Otherwise unless they are under geared it doesn't happen much due to Sorc's / Sage's always having a constant shield. Not saying it doesn't happen at all, it does but not often. Under geared players I've hit for 6.5k.
Back on subject though.
I hate being pushed back as soon as I hit my smash ><