I capped out of thid after one evening...I'd say build for Cale...much more time to have fun...and you can get the stun off PA.
Just don't ding 3L0 unless you're happy with spec...the free respecs stop if you hit lvl 50 or RR3! But it will take some time to get 2L9 in Cale...it's around 300rp for a solo kill.