(This posts is about Vanilla AoM)
I don't play Odin anymore, but when I did (on 1700-level), I found the Forest Fire power quite crap. I normally used it when raiding woodies, maybe 7 RC and FF could take out about 5 villies when I was lucky. But when I was not, the casaulties would probably be 1 vill and a short disruption in wood flow. Now, on 1800-level it's completely worthless, because no one is stupid enough to only use one wood source.
As for using it to cut paths through walls: In vanilla walls are sparely used by good players, and then there is always a way through them. Using Forest Fire just to get through takes about as long time as finding an alternate route or destroying a gate.
And on 1800-level (where I play as Loki), no one is dumb enough to build close to trees when against Odin/Thor.
Still, what many is forgetting in this discussion is that you don't choose God Powers, you choose Gods. And Freyja might have other advantages that cover for this weak GP.
[This message has been edited by Lunkan (edited 08-09-2004 @ 11:54 AM).]