Marauder build, help me please :(

so I've been playing my marauder now with a one-handed mace and shield. I've mostly just been using ground slam and heavy strike to take down singular mobs. However i have hit a dead end in the game for myself at the moment. I am level 60 in act 2 merciless. It takes me ages to take down a group of mobs no matter what they are, yellow, blue, white, it still takes me ages.

I deal around 270dps with ground slam without auras.
345dps with wrath and anger... pretty fucking low.

here is my build so far.


i don't know how to show my gear in a forum post so if someone can tell me how to do that then I'll post the gear I'm using too, a long with my gems.

This is my first hardcore character, I'm surprised enough to get him this far so please cut me some slack if he's bad or whatever.

bump