Can IVF fight off the Riombaran 150+ soldier units, or all the crazy SF? Rio can walk in and crush nearly anyone other than Thalmarkin, or some grand coalition. Morek could do the same against anyone close. (Assuming they can get organized.)
Also, concerning this: IVF and Nothoi together could take on Riombara and it would be a fair fight. Morek is disproportionately huge compared to its neighbours though, I'll give you that, but Luria is a match.