So, if we consider the statistics information:
Riombara has +44K CS.
Enweil 9k CS
Nothoi 17k CS
Fronen 19k CS
This is considering mobile and militia, but still, Riombara has more CS than all the three realms combined and unless OG starts moving and really be a part of the war, then things will continue in favor of Riombara...
and yet, they need help from Ar Agyr....
That's a really interesting move...