Here's a mini-rundown on spellenhance.
[char=Jaedenar]Arock[/char]
That spec is pretty standard for spellenhance as is the gear ( normally he uses BoA chest and aquamarine eagle ring). You should have all the normal alt gear like rings, trinkets, 30int weapon. Bleh, I just realized he's elemental.
The World of Warcraft Armory
That is the standard spellenhance spec. Playstyle is very much centered around utility. In bg's you wade into the middle of combat adding purges, grounding totems, offheals, spell cc (wind shear), and windfury burst dps. The reason spell enhance tends to be in the middle of things is twofold. First, our manaregen relies highly on watershield. So unless you don't have a pet on you or a player attacking you.. mana can be an issue. Secondly, we take dmg well and dish out a respectable amount all the while adding group buffs and cc all over the place.
Stoneclaw totem + frost shock + earth bind totem + ghost wolf is your escape measure. Part of the allure of spellenhance is that it can add a ton of pressure to an enemy team via purges, shocks, and surprisingly good 1hand windfury dps.
I think the problem with the majority of spellenhance's right now is they focus too much one one aspect of the character. You see them tunnelvision dps or hang way behind trying to outheal a paladin. The best spellhancers I've seen are constantly changing rolls depending on the situation. Purging a FC while cc'ing a healer, marking rogues while offhealing a group. A lot of people only see the endgame stats and don't take full measure of what spellenhance brought to the table in any given game. I'm fairly new to the class but I'm sure we can get someone like Grodala or Arock to offer there insights as well and I can try and answer any specific questions you have.