Best arc build/ascendancy

Hi guys,

i would like to ask your opinion. Which is the best arc build for clear speed, for boss killing and for challanges?
I've read severel forum guide e.g. hierophant arc totem and saboteur arc trapper, but i Don't know which is the better.
Thanks you for your help:)

Br,

Adam

p.s sorry for my english, it's not my native language.