Insofar as the TTT is a plan to unify the three seas, maybe it didn't matter if the holy war failed. A failed holy war would see Kian and Co as the preeminent, or more so, nation--all of the other nations are sapped of their strength, the Scarlet Spires and Imperial Saik destroyed.
In an alternate universe, the Great Ordeal goes north under an Anasurimbor + Fanimry! Inrithism reinterpreted to be a subset of a new revelation of the Heir of Fane.
For Moe/Kel the worst thing that could have happened would be too much carnage without enough left over soldiers/sorcerers/granaries etc.