Personally I have skilled everything on armor and regen health. My agility is at the lowest level. But I use the second jump that gives you an second boost after you are in air. I am still faster than most hunters. For PvP a good tip: Do never EVER use Fireborn. I have done it too many times, and got butt-blam!-ed by a shotgun, and the animation didn't even ended..... For Voidwalker I prefere the Nova Bomb that splits in the little Bombs. Why? Because (for example) A titan sets a bubble right on a flag, you can destroy his shield with the first bomb, and with the 2nd and 3rd Bomb you kill the titan. I also prefere it because it has a huge range. You have to be really dumb, when you are not able to hit someone with it. ;) Good luck in Crucible!