Fusion grenades can kill without being stuck on though, as they will do full damage without a stick. But they also have those which can kill without the sticking properties. Yes the enemy might have to be standing in it, but even so, it is possible. The titans pulsing electric grenade (forget the name of it) has far too much damage for how long it lasts. Two pulses can kill a person, and it can hit around corners too. The fusion and magnetic grenades, from what I can tell, have a better target acquisition than the blade dancers. I can throw mine right at people, and watch it go right past them and curve behind them, while the other two can be a foot away and warp in to the person to stick.