I think that area that connects to Rhun and Qarir should still be Bombladoy. I highly doubt it would fall that easily with a hell ton of troops defending that.
craft's logic: even thogh their soliders are killing mine in huge numbers, set traps, their food is being poisoned, they are being attacked by wild animals and the enemies force and ambushes, we still invade their land easly
you forgot the fact that in deep jungles fire turns off by rain, the water on the top of the trees and stoped by rivers, roads and cliffs yet you easly burned it
Also, I don't get how the undying sun can take all that land so swiftly. We have the defensive advantage, and I feel that you are interpreting Bomladoy's armies to be weaker than they should be.
I live in a very humid area, in a low sub-tropical River valley. I understand how humidity works. I Also know how fire works. Rain can put out small fires, but a raging forest fire cannot be easily put out by rain