MTG Salvation

I got the premade mind edh deck and now i have made my own with a sigarda herons grace
here is the decklist http://tappedout.net/mtg-decks/sigarda-human-tribal-edh-2/
any suggestions welcome

I'd recommend going to the edhrec website and looking at her top cards. There are some major human tribal pieces that you should be looking to add as you improve the deck. I'd also suggest taking out some land and replacing it with ramp. You could probably get away with 35 or 34 lands with your low curve and your deck will get out of the gates much faster.

suggested ramp cards?

There's a few

Nature's Lore
Safewright Quest
Cultivate
Kodama's Reach
Birds of paradise
Elvish Mystic
Fyndhorn Elves
Avacyn's Pilgrim
Llanowar Elves
Exploration