Work in progress, but fun stuff!
The ideal draw is Innervate/Astral Communion, but unlike most decks where you're screwed if you don't get it, this deck can handle it's own without it. I've won several games with both sitting in my hand for much of the game, since I didn't draw them early enough. It's still worth having however, because it's fun, and if you happen to get it, it's very unlikely you'll lose. If you get Innervate and Astral Communion in your starting hand, you want to keep any bad cards with it. So another Astral Communion, Wild Growth's, etc., all become very useless and cards you want to throw away from playing Astral Communion.
Wild Growth, Grove Tender, and Nourish is key to getting to your big minions quick without Astral Communion. Grove Tender is the MVP in several games, it gets you something on the board early and played on turn 3 allows you to play a 5 drop, or innervate a 7 drop next turn. If you're playing it later in the game however, the card draw will usually be the better option, unless you need that one extra mana to play something in your hand the following turn. Nourish I've used more often than not for card draw, however there are situations where the crystals could be good. Innervating it on turn 3 with a 6, 7, 8 drop also in your hand, for example, is very very strong.
Many of the legendary cards could be switched out for others, however I'd try to keep a balance of cards from 5-10, allowing you to play strong threats on every turn. Playing Emperor is always a strong card, but with Aviana in your hand, that one reduction on her is incredible. It allows you to play an extra minion for 1 cost. Using Innervate with Aviana is also very strong, for the same reason.
Tree of Life can really save your ass, I'd avoid cutting it. I've considered 2, but I believe 1 is the right number at the moment. Frost Giants are amazing, you can usually play them and another minion when at 10 mana.
I'd happily take any suggestions if people have them, this deck is a lot of fun and I think can be competitive as well.