Keep at it. Just pay more attention to your losses. Having a good healer helps, but.. it is mostly you (esp at this rating).

This is insanely hard to respond to without insulting, even moreso because you don't know me. - here I go

I'm not sure how long you have been doing this for, but more than 10games a week is needed to learn how to react to certain combos.
Enchant your gear, unless armory is lying to me
Fraps fights, rewatch. Learn if you are still unable to figure out how to correct the losses, post some fights. People here seem nice, they can offer a few pointers.
I messed up a lot when my strategies sucked

Welp, my useless posting did nothing :P
GL and don't give up!!