veil ASAP but may need to work up to it, no particular order
Vyper SKill build
Vyper Build Description
The ability order is very contextual, the build is for an assasin, lots of shields, lots of speed, some spirit lifesteal, spirit damage focused.
You can ambush with knockdown/ult, hit the alch/coldfront, while shooting and daggers, hit ult or knockdown after, whichever you didn't use, and finish with 2. Pretty solid.