My only real point of contention is that I do not want us to continually put off working on Amrelath's phylactery. It had side-benefits to other ongoing projects, and there are always things that people would rather Lya do other than that, so saying "X is more important, we can do Y later, we have time" is not a hook I will bite into.
This is a friggin Dracolich. Think up two or three targets you wanna smash with it, then immediately go smash them, but don't keep it hanging around. I won't be even moderately comfortable with Amrelath around until he's among the living again, so dedicate some Lya time to working on him consistently. I would say start this turn, even with a token few days. Then next month, possibly with more days, and the month after, and so on until we've got a workable solution.