The duration is the problem. I'm fine with taking 150 damage, it's a -blam!-ing grenade after all. But it shouldn't cripple me for 10 seconds. Keep the damage but lower the burn to 3 seconds. All burns should be 3 seconds tops. As far as I'm concerned, if you can't kill me in 3 seconds then you don't deserve the kill. Especially since it only takes 1 body shot from most weapons to kill me after the burn is done.