Alright, I dont think there's anything too original here. The basic concept is life gain. Tapping and uptapping Wellwisher as many times as you can to gain the most life you can. Pretty common for an elf deck. Then add in Boon Reflection to make it more potent. Then throw in Sanguine Bond for devastation. Now anytime you gain life your opponent loses it. Add in True Conviction so even if your creatures attack and are blocked you still gain life, and all the inevitable effects thereof. Nissa Revane's ability can be used to benefit from this as well.
There are several combos in this deck. One very useful one is Skyshroud Ranger and Golgari Rot Farm. Use the mana you want to in your turn, then in your second main phase play Golgari Rot Farm and return one of the lands you tapped for mana this turn to your hand, preferably Graypelt Refuge then replay it with Skyshroud Ranger's ability.
The obvious combos are pretty much tapping over and over for buffs and tokens if you need to later in game. The best way to win quickly would be to get a Sterling Grove out and use its ability before your turn begins so that you draw a Sanguine Bond, play it, and gain life to win. But I didn't want this deck to be a one trick pony, so there's other ways to win and I think this deck would be a lot of fun to play and a good challenge to play against. But not one of those super ridiculous decks that makes you hate playing.
The sideboard is more or less prevention incase your dealing with destroy enchantment effects, counter spells, direct damage and the like.
I'll be working towards obtaining the cards to actually have this deck, but until then this would be more or less my "perfect" version of this deck. I have the basic cards that make the deck work, just not all the extra awesome stuff. If you have any suggestions you think would make this deck better I'm always open to new ideas and criticism.