D-mo 130 build question

Hey guys, im trying to solo cap vow of silence with this build, and i keep dieing because of rending sweep.

i get hexed by the mesmers in the back of the group, and then all of the dervish in the area have rending sweep, so they instantly strip my enchantments.

any suggestions on what to do?

I wanted Vah's scythe and decided to farm him.
I also died a few times, but did it once or twice solo... but it's annoying, you need to cover your enchants very well. So I asked a guildie to help me and spam prot spirit on me :P