Feedback Please (green)

This is my first deck in a while.  I'm in a group for sealed play (using 10 boosters and one deckbuilder's toolkit)  and this is the best I have come up with.

http://deckbox.org/sets/437702

I am on the fence about using some of the following cards...
Naturalize (x4)
Ranger's guild (x3)
akroma's memorial (x1... would love to use this)

Really welcome any feedback or suggestions