CAUSTIC IS WHAT I CALL A INDOOR LEGEND, MEANING THAT HE IS A ABSOLUTE POWERHOUSE AT CLOSE RANGE. SO WHAT YOU NEED TO DO IS LURE THE OPPONENTS INTO A ENCLOSED SPACE AND UNLEASH THE NOX GAS, BUT THAT'S IN THE CASE THAT YOUR PLAYING SOLO OR EVEN OFFENSIVE (THOUGH I STRONGLY DON'T ENCOURAGE YOU TO DO THAT UNLESS YOU KNOW YOU CAN); ALSO... CAUSTICS ULT IS WHAT I USE WHEN I NEED INSTANT GAS, HOLDING A CHOKE POINT, OR GASSING OUT A 'BUNKERED DOWN' ENEMY SQUAD. LAST THING YOU NEED TO KNOW IS THAT CAUSTIC IS FOR THE MORE PATIENT AND STRATIGEC PLAYER