Dual wielding or 1h & shield?
for dps in pve all you need is axe+mace because you can stach 8 vulnerability in 2 skills (10 of On My Mark!, if you want).
If you’re in a good team you can try to change the secondary weapon and use something like axeaxe (now the skill 5 give good damage, help to recharge adrenaline, expecially if traited, and can be good as a 15 hit finisher combo skill)
But the best is always axe+mace.
You can use shield in pve only in dungeons, if you want a little more survavibility. (fractal at high levels, for example)