In this war, though, Riombara has a major strategical advantage. We have two regions in which we can easily defend against Enweil. Meanwhile I'm having fun playing cat & mouse with the Enweilians.
This was always the case, though, at least in the wars I participated in. Sure, you didn't have fwuvoghor before, but attacking the north left the south exposed. Avalon had played a great role in cracking that defensive shell. Fwuvoghor prevents looting parties, but it wouldn't be that hard to defeat if Enweil decided to commit to it.