No, it's not overtly crazy. Besides, one of the enchantments causes me to sac it when I want to. Here's the decklist for my R/G Saproling deck (I built a straight Thallid one once, and it never really panned out. Besides, Saprolings are the key).
1 Black Lotus
1 Fork
1 Mox Diamond
1 Mox Emerald
1 Mox Ruby
1 Sol Ring
1 Wheel of Fortune
2 Coat of Arms
2 Mirari
2 Nemata, Grove Guardian
2 Verdant Force
3 Fires of Yavimaya
3 Goblin Bombardment
3 Parallel Evolution
4 Birds of Paradise
4 Hull Breach
4 Saproling Symbiosis
4 Spontaneous Generation
4 Taiga
4 Wooded Foothills
5 Mountain
7 Forest
This could easily go into 1.5, just take out the Restricted and add some Bolts (Lightning or Fire will do).
BTW, Train, LOVE the Coat! Once for 24 24/24 Saprolings on the table.