Titan HM and all of the other fights in this game are simplistic. Unfortunately, they require more reaction than actual strategy. If you are trying to do titan in duty finder it will fail as there are under geared, under aged, and terrible players who are just trying to get the quest done. The fight is over tuned and has way too high fail rate for a duty finder. My suggestion is to find a fc, one that hasn't had most its members quit the game already and has properly geared players for the fight. There was a time in final fantasy where killing a primal meant having the proper resist gear and strategy. Now I guess its all reflexes and putting up with idiots.