Well I looked around at some of the strats on how to beat a monks double and I saw some that looked like they would work, but sence I was a lvl 14 and had 10 hp it was going to be a little harder so. Here is my story.
I started out trying to use smiting skills and protective bond, I brought mending to keep me alive sence i would only lose 2 life at a time. That never seemed to work. I would cast my skills before I went in and then I would use my smiting skills and the double would just heal himselve. So I found a cool skill. Scourge Healing(foe takes 64 some dmg when trying to heal) I thought that might work to keep the double from healing, nope. So I looked on here and found the sword trick with deadly riposte. Thats one hell of a trick

And the stats and all