So having my GF run Selesnya Aggro for the time being, I can say there is a lot of promise there. The ability to consistently drop 3/3's is pretty big and keeps the pressure on even the most polished tier 1 decks. Here's a link to Craig Wescoe's version that he said he's planning on running these days: http://magic.tcgplayer.com/db/article.asp?ID=11460
That being said, I have a slightly different take on the deck here: http://deckbox.org/sets/428181
My thoughts on the deck:
- As you currently have it constructed, you have essentially ZERO ways to remove opposing threats outside of Selesnya Charm (which is among the major reasons to include it over Giant Growth - the other being that little word "trample" that comes with its pump)
- Precinct Captain is a pretty solid piece who can also help you recover post-verdict on his own given the tokens he creates
- Advent of the Wurm is an absolute must have 4x. I cannot underscore this enough... those tokens can be cast post-verdict in their end phase, leaving the board empty with a 5/5 just going to town. This provides you with threats that are outside of pretty much all of burn range and requires more unconditional removal.
- Banisher Priest is a tempo machine. Sure he gets killed quickly and often, but being able to remove something from play even temporarily can be big. Nevermind that he deals with a LOT of opposing threats that otherwise would cause problems all day
- You really don't need Druid's Deliverance at all in an aggro build... that's just completely counter to the plan
- Rootborn Defenses could realistically be sideboarded until you run into a deck with board-wipes. If you're looking for more targeted protection than it or Brave, you could easily run Gods Willing which can remove any enchantments (see Claustrophobia), protect from targeted removal, AND helps you with scrying
- Ajani, Caller of the Pride is an absolute all-star in this deck. I've lost to his flying, double-strike ability so many times it's not even funny... even at 10 life, a 5/5 wurm that suddenly has flying and double-strike simply ends the game
- Lastly, and this is a point of personal preference, but I don't really feel like Voice is an aggro card... Sure, it restricts the opposing player in some ways and has resilience to removal, but realistically, the advantage of Selesnya is to be playing 3/3s for two, rather than 2/2s for two. It's a good card, and definitely one I would keep in the SB (if I still had any), but I don't know that I'd MB it, as in my experience, it underperforms in a lot of scenarios for an aggro deck. Personally, you can fill those slots with some pump/anthems - namely Spear of Heliod and/or Path of Bravery - being able to bump those centaurs and lions up to 4/4s can easily make the difference in the game
Anywhom, it's not a crazy idea to think Selesnya aggro is going to work. In reality, the power of the deck is actually quite solid and consistent. Frank Lepore also did some videos on a build and the only deck he was struggling with was Mono-Blue Devotion as he didn't have any Banisher Priests or Last Breaths to deal with Master of Waves but otherwise, he was steamrolling the competition.