I am not sure Taemek how much your War if you have to ask that question. WAR and PLD are the only classes that do slashing DMG, and there is no other class with slash debuff. And no, they don't stack. How much have you played this game to not know any of that? What testing is needed? Also, the utility of SE usage is in maintaining your survivability while you are MT, not increasing group DPS. If you are OT, you don't have to worry about self heals, so then it's not even an issue. You should actually talk to the WAR in your FC before bringing the ignorance here. You'll just seem smarter when you show a basic grasp of WAR mechanics on a WAR thread.