IMO the Dual Axe is just as good as the 2H, Because a lot of there skills have Stuns and they do have more consecutive hits than the 2H, Verses the Charged attacks and delays between each 2H Sword attack. They do have Attack rating increase so with a good Crt axe you can get just as much crts as the 2H.
For a Sub i would recommend Bard for the Dual Axe for more moving speed and or Even 2H sword.
But dont take my word for it heres a Dual Axe in Action
http://youtube.com/watch?v=CSyl-1cH02Y