Skill haste is technically better for certain things with no investment into skill power. Using the support station method from 1.5, in 1.6 (for the first part of CS) they come back quicker so for an all damage build, don't waste rolling skill haste or even skill power on anything IMO.
PVP I run booster shot and concealed pulse, LS, I run booster shot and recon pulse due to the lower CD.
@TonyTurbo78 fire turret is so weak now, it got a proper nerf and is only strong if you go really into electronics with firecrest, so if your going to run the DZ, have one person on concealed and the other on immuniser as you will find a lot of seeker mines and grenades.