Warrior weapon advice

[Guesty07]

Hi all, yet another warrior weapon thread! Would like some advice on how to progress as far as weapons go on my warrior. Heres what I have currently.

Axe of the slayers 2hs
Obsidian shard 1hp
Polished granite tomahawk 1hs
Obsidian scimitar 1hs
Screaming mace 1hb

I'm beginning to wonder where I should go from here. I currently have about 600pp. What do you suggest? I was pondering such things as another Shard, a runed falcon, a enameled black mace?

I'm honestly thinking that the white damage of the shard and tomahawk, which is much goto combo when I am the tank of the party, isn't quite cutting it. The shard is obviously very strong agro when it goes off, so do I double down and get a second one and just rely on the proc? Or do I try to get something with a better ratio to help keep up? What about when I'm not acting as main group tank? Let me know how youd play this one out, thanks.