You've got some nice cards to work with. If you are going to make an elf-heavy deck, definately include the timberwatch elf and the wellwisher. Wood elves are great since they will weed out your library. I'd also check into getting some
wirewood symbiotes . Their ability to send an elf back into your hand is awesome to use with the wood elves and the fierce empath every turn. It's also great because you can block with an elf and then return the elf to your hand so you can play it again. The symbiote is a great card for elf decks.
The Plated Slagwurm, Living Hive, and Rhox are great end game beasties. The Elvish Soultiller is interesting. I'd also look into an
Elvish Piper .
The big thing to watch about decks is not to diversify. Find the cards that you want and put 4 of them in there. It increases your chance of getting your cards and it streamlines your deck.
