Build based on strategy of fast shooting in smoke. First of all, you should reach classic Concealment Expert, then Superintendent, then Fearless Brawler to increase DPM, and last you should get Main Battery and AA Expert (if you like tortures of bad ballistics) or Radio Location (to kill some similar smoke assassins in close (12.4km) dogfight). And remember, radar and hydroacoustic search are your main enemies. Tested in Ranked Game