spec layouts are important, for gear, heres the mai deal, get oranage slots ASAP you can then just spend 2 or 3 commendations on each world upgraded the oldest (lowest number) of upgrade in each slot, lett the gear grow with you, thats the best idea, get orange gear and upgrade slots, for gunslinger its about killing things before you die, to that effect.
Accuracy > Crit > Surge > Power > everything else
people will tell you that accruacy is not needed why bother with it etc. what they don't realize is that after 100% accuracy actually turns into armor penetration which make every shot ignore a certain amount of your enemies armor. People who hate accruacy don't know that.