3 Nullmage Shepherd: Get rid of two. One is enough, it isn't a particularly good card.
4 Rhys the Exiled: Get rid of one or two, but for entirely different reasons. Rhys is awesome, but he's legendary, and that means that if you get a second one in your hand, he'll probably not be that good for you.
4 Voice of the Woods:
Way too many! this card is at the very top of the scale for elves, the limit should be five mana. Cut down to two or one copies.
3 Wirewood Hivemaster: Dunno, he's good though.
4 Llanowar Elves: Duh, that guy needs to be in. If you really want to abuse him, add a concordant crossroads. I've had games like this: first turn, Concordant Crossroads. Turn two: 4x Llanowar elves, priest of titania, Heedless one, berserk, attack for twelve.
4 Wellwisher: Another given. There is no disadvantage to this card.
3 Elvish Soultiller: Run two, or if everyone is packing Wraths and Damnations, three. Never more.
4 Wirewood Herald (to get what I need, is 4 too many?): Four is perfect. They're cheap, and they are incredibly annoying.
4 Caller of the Claw: I would cut one. There's a lot going on with the herald, so you'll be able to have him pretty easily. Don't worry.
3 Wolf-Skull Shaman: If you're running him, play the Wren's Run Packmaster. It'll give all your wolves deathtouch. He's definitely a solid choice; a 2/2 for two with such a solid effect has to happen.
4 Imperious Perfect: Given. This card rocks.
2 Seedborn Muse (Does this go in this?): Granted, it's good, but... It's not an elf. I am a serious purist. However, he interacts incredibly with imperious prefect+llanowar elves or wellwisher.
3 Lys Alana Huntmaster: I learned this lesson quickly: this card is just too expensive. If you have more luck here, go ahead, but I wouldn't play it.
2 Skyshroud Poacher: WTF? Why haven't I ever heard of this guy? That's bordering on ludicrous!! Add two more!!!!!
3 Coat of Arms
2 Beacon of Creation: Get rid of 'em. They aren't that useful.
2 Gaea's Touch
3 Wood Elves: Get rid of them. They seem good? They aren't that useful in elf decks. Get a few Priestesses of Titania and you'll understand what I mean.
2 Aspect of Mongoose: There are better cards for that. Get Eladamri, lord of the leaves. He gives all your elves forestwalk and Shroud.
3 City of Solitude: Definitely for multiplayer, other than that, sideboard it in constructed.
2 Debtors' Knell: ARE YOU NUTS?!?!?
2 Elephant Grass: See debtor's knell.
2 Gaea's Anthem: Use four.
Maybe add: 5 Island
4 intruder alarm
or something like that. If you're gonna run llanowar elves and the Perfect, why not have a way to go infinite with them?
Yeah, add Priestess of Titania to your deck, Heedless one (power and toughness equal to the elves in play, trample) and a few more boosters; Gaea's anthem, Eladamri, and Champion of the Elves are all good moves in that case. Anyways, try it out. And in multiplayer, people aren't going to be able to thank you enough for Concordant crossroads... until you smack them for twelve or twenty-four with a berserked Heedless one.
Give it a shot.
Oh yeah, and Essence wardens. Try them out (they're also elves, and interact nicely with Imperious prefect.