As was said in your other thread, mix in more crit & damage on your sets and less sustain.
Don't use reinforced or impenetrable on your armor, use infused on the big 3 pieces (head / chest / legs) and divines on the other pieces. You do have at least 5 pieces of light armor, right?
You also don't need defending on your resto staff, your ward should be all you need for defense. Use precise or go for 2 swords instead of resto for the extra spell damage and set bonus (don't forget the twin blade and blunt passive if you do this).
Inner light and bound aegis will each bump your max magicka by 5% when active.
How do you have your champion points assigned?
You also need to put all your points into Thaumaturge (for now, Elemental Expert after TG releases)