Not bad not bad at all.
First of all I must agree with the post above me.
Forest spirit vs gaint frog damage over turns.
Forest spirit 1, 4, 9
Gaint frog 3, 6, 9
If you think you will have forest spirit out for more than 3 turns most of the time then yes forest spirit is better, but if not then frog is better. I like frog as it allows you to play some type of water card and no drain that quanta with forest spirit.