After looking over your spec, I am curious over a couple of things...
Ancestral Knowledge: for 5 talent points, you are gaining 17 int, which gives you 17 AP and a very minor spell crit buff. To make this work, you would either need to switch to more mail with int or just dump the talent. Granted, you do need to put some points into this to get to the next tier of the talent tree, but a waste of points alltogether.
Improved Shields: I really don't see how much of a benefit that your shields will give you @ 60. I can see about keeping mana shield up with such a low int total that you'd need some regen to keep you going... but +15% gain on 198 dmg in your current spec = 30 extra dmg when someone hits you. Better use of talent points elsewhere.
Static Shock: 6% chance to on melee hit (or melee ability) to do 198 dmg. With a 3.7 speed weapon + 8 sec CD on SS, you are looking at ~18 chances to proc it every min. That gives you a 64% chance on average to proc it once per min... probably could use those points elsewhere also.
Mental Quickness: At your current AP, 3/3 Mental quickness will give you 197 SP. Combined with Maelstrom Weapon, this gives you more pop in your dps than any of the above spells.
Toughness / Anticipation: Either (or both in a partial combination) can be picked up with the leftover talents. Toughness for mainly the 10% stam buff, Anticipation for the disarm duration reduced. You can't afford to go without your 2H weapon whatsoever and Toughness will help you shore up some of your health issues.
Sample Build - Enh Shaman @ 60
Hope I helped a bit.