lvl 30 basic warbird build: first u max out break armor and blast shot. put 5 into focus and 5 evade. put 2 into repulse and blinding shot. put 1 into thorn root. then u will have 3 or 4 skill points left.

if u want extra debuff and cruel blast combo (extra damage), add the remaining points into shattering scream.
if u want extra crit, hit%, dodge go up, then add points into focus and evade. (if u chose to do this, u might have a point or two left over. Your choice )
if u want extra blast damage, then u put points into repulse shot and blinding shot.

I personally chose to put the remaining points into shattering scream.
the basic combo goes like this (spammed skills as fast as possible) break armor---> shattering scream---> thorn root---> blast shot---> blinding shot---> repulse shot
You can always tweak around and change the skill order a bit, and even how many points into one skill. i just said that was the BASIC warbird build. most warbirds, even me changed around the skill order. good luck with the build