So one MAJOR thing which I have come to discover recently is the necessity in sPvP of map awareness. If you are going to play staff or scepter, you really HAVE to take advantage of the map layout. An equally skilled player of a different class is going to tear you to shreds on level ground unless you play one of our bunker builds, which are fun but seemingly less rewarding than a more damaging build.
Every single point in the game has some kind of high ground area which requires the enemy to go out of their way to target you. Combined with multiple ways of dealing with projectiles, we can more than hold our own as a glass cannon if we are willing to learn the map a bit more so as to maximize our ranged advantage.
So, all you aspiring glass cannon elementalists, get on top of things. Make the enemy choose between fighting on the point while you drop freight trains on their heads or disengaging from the fight to track you down. You can make a tremendous difference in the outcome of a battle.
Now if you’re a D/D glass cannon, I have no advice for you. Good luck… lol.