Update Life blast to Plague blast Why not?
The distinction between grandmaster/master/adept is also an irrelevant one now that you’re committed to an entire line, it doesn’t matter where the traits fall in if you’re going to take that combination regardless.
This is a good thing to remember: the only reason to have the most powerful traits in a line all be in the GM tier is to prevent people from taking more than one. A lot of us moaned that Terror was not worth a GM slot when the specialisation changes were previewed, and that came back to bite us in the behind, since being unable to take both Terror and Path of Corruption made terrormancer a total joke.
A bad necromancer always blames the corpse.