Quote from Dunharrow »Soul of Shandalar may be needed as a removal/mana sink card. Actually, you will end up with a lot of mana sinks, so Seedborn Muse is needed.
You need Sakura-Tribe Elder and Farhaven Elf. Probably also Solemn Simulacrum.
Voyaging Satyr and Arbor Elf will get you extra mana with the general.
I would play a bunch of creatures that let you play extra lands too. Azusa, Lost but seeking, Oracle of Mul Daya, etc.
I have an Gruul deck that plays an infinite combo that would work:
- Something that gives hast, probably Urabrask the Hidden.
- Temur Sabertooth
- Either Voyaging Satyr + Nykthos, Shrine to Nyx (infinite mana any color) or Karametra's Acolyte (infinite green mana).
To me, this combo will be ideal since you have so many mana sinks.
Eldrazi also seem good. Since you will have trouble interacting, I think you need to try to win quickly.