[I actually talked about this jn an earlier post in case you missed it.
7. Actually, the more I think about it the more sense it makes. He may have ultimately lost, but he still led a protracted war that required the union of two different factions to overcome him. Plus before that he successuly subverted the region into the control of Shar, captured a powerful celestial being and generally was a formidable presence. Plus if you read some of the texts around Moonrise Tower you see he came up with very effective strategies to bring various factions under the cult's control. He's clearly a very good general, you can be good at something and still lose. Regarding his loyalty, that actually makes perfect sense too. He is consistently motivated by Isobelle throughout everythingin his story; he turned from Selune to Shar because he was overcome with grief for her death and wanted Shar to make him forget. So of course Myrkul would look at that and rightly think that if he were to actually give Isobelle back to him, Kethric's loyalty would be assured. It's a very safe bet for Myrkul actually. As for the other stuff about resurection, I again put that under stuff that wouldn't bother me if the rest of the story were better.
As for how they got in contact, I'd assume Myrkul reached out to him, since I would think communicating with a spirit would be a fairly easy thing for Myrkul himself. Why he picked Kethric specifically I don't think matters too much since he clearly wanted a general for the Absolute's forces and Kethric fit that description. In fact Kethric is probably a better choice than some necromancer with a lust for power because its far easier to be sure of his loyalty and that he won't pull some kind of betrayal for more power. However you do make a good point about how Kethric was resurrected, since unlike Isobel I don't think we even get a hint of his death being anything unusual. So yeah the rules of resurrection there are even more clear broken.
