That is not a question of weak or strong nation (I do not think it matters for beginners anyway). And Yomi do not seems weak to me.
But the early game was surely awful (War in the very beginning of a game looks very hard to handle, diplomacy makes everything). The situation is probably desperate, but I knew I was going to inherit a bad position, no problem
. I only want to survive a little to learn about this nation and this situation. That is why I am looking for peace !!
Dai Onis looks indeed very powerful, and magic variety is maybe balanced by the pretender, I do not know, I did not seen him, nor the prophet...
In my first game, Shinuyama has won, There are probably not much differences with Yomi.