GBW - Elves love Saprolings (Tribal)

Ok, here's a new deck I've been working on.
This one is the first deck I post that I'm impossible to finish since I'm lacking several cards. Still, I plan to have this one up and running sometime in the future. It might need some tweaks though and for that I'd like to have your help.

The deck:

LANDS - 18
4 Forest
4 Gilt-Leaf Palace
4 Temple Garden
3 Plains
3 Swamp

ARTIFACTS - 3
3 Umbral Mantle

SPELLS - 8
4 Abundace
4 Sylvan Library

CREATURES - 31
4 Wilt-Leaf Liege
3 Golgari Guildmage
3 Hunter of Eyeblights
3 Llanowar Dead
3 Oracle of Nectars
3 Priest of Titania
3 Seedcradle Witch
3 Selesnya Evangel
3 Selesnya Guildmage
3 Skyshroud Elf

With the combo within the deck (Priest of Titania + Selesnya Evangel/Guildmage + Seedcradle Witch + Umbral Mantle) one can have infinite Saproling tokens.
Black is there for the regeneration through Golgari Guildmage and board cleaning with Hunter of Eyeblights.

Any suggestions will be welcome, of course.