Knock the dragon down with boulder bash (geomancer spell, you can try using another skill to knock him out), use disease if you are having problems knocking him out. Then weaken him with nullify resistances and whack the heck out of him with flurry, etc. Use wildfire or fast track to haste your party if you can. The sucker will go down in no time.
Last edited by dlux; 27/07/14 04:26 PM.