Suggestions with my green deck in mtg?

Seems like a pretty good deck. Definitely cut 2 oran riefs, 4 bellowing tanglewurms, 4 engulfing slagwurm, and 2 thruns. Thrun is awesome but he is legendary meaning you can only have one out at a time. Put in 2 more green suns zenith and 2 more forests. Good luck :).