-Pure Ranger Build- what u think?

I got this build from forums on websites, and kinda nice to try without traps, why rangers wont get trap? because after 2nd class choice rangers will not get any upper lvl for traps but Avengers will get till 10lvl rank.Actually i m fine with those build atm no problem without traps (except paralysis trap).But i m thinking about attack shots, maby someone has some ideas about shots such as mana drain or -def or other shots which ones are good have no idea about them.I think mana drain shot (cant remember the name) kinda nice for pvp.It seems like my build will be like this with some exceptions +/-.If you have any other ideas, i ll be happy to hear those.


Buffs
sniper's coolness(5)
high concentration(5)<---with DNA
launcher upgrade(7)<---to be maxed with DNA
repair launcher(7)<----to be maxed with DNA
weapon mastery(7)<--- to be maxed with DNA
poison bomb firing(1)

Attacks

tear bomb (6)<---to be maxed
uppercut(4)<---to be maxed
brain damage firing(1)
quickfiring(3)
paralysis trap(4)<---to be maxed
shock firing(1)<---to be maxed

Others
escape(4)<---to be maxed
stealth detection(1)