The Third Invasion sort of ended with a whimper rather than a bang you see. One minute it was invasion, the next it wasn't. A few realms worked together then to destroy the last vestiges of Arcane's realm, Vlaanderen. There was discussion here and there about what to do about a few surviving daimonic enclaves. I think Heen, Sint, Mesh and perhaps Old Grehk briefly teamed together to try to tackle the lands north of Sint but they were never recovered. Then Mesh made it her duty to quest all over to destroy surviving daimonic enclaves although she'd made it round most rather than all of them by the time the Fourth Invasion finally rolled round...
Except it pissed off Sint, and Sint threatened them never to attack Jobo's again as there were still some semi-active daimons there.
Mesh went after a few nests, but barely any. It was more of an excuse to tresspass and assist Riombara than anything. There were still plenty of daimon nests around when they decided to gang-bang Enweil with all the other western realms.
Then, after a ceasefire was signed with Enweil, she went after Bara'Khur. Mesh' crusade was nothing but fluff, they spoke a lot more about it than they did anything, and they spent most of their time between the two invasions attacking other realms than attacking nests.
