Well first off thieves feel like they can pwn us and that works against them especially whilst fighting me the only time i have a serious problem with thieves are when i cannot focus all my attention on them. So with that being said first thing is position. Keep that thief away from you with every bit of endurance and kiting ability you have. Lets run SB and 2x Axe. So crippling shot gives you time to get nice damage output maybe a third of his health keep auto attacking spam all except your third skill. Now when they SS use 3rd skill and if it doesnt get you out of their damage range switch to 2X axes. hit number 5 immediately the thief will almost kill himself. Spam the rest of your skills and hes pretty much dead will update later must run now sorry