No other mods running?
No changes are made in either mod to any of the files which are listed, though it is just doing them in order, so only the last one matters. If any of them.
The changes for Necromancy were to make the Barrow & Graveyard gain Yields, as well as allowing you to build Graveyards & Barrows (I thought the Graveyards were going to be removed... hrm...).
Strange Crash so far. I granted it to myself in Worldbuilder and had no problems, but when I set myself up to research it I did get a crash. Same results with the normal WorkerMod, so it isn't due to the changes that Mailbox's Module make.
I loaded up the DLL from my MODCOMP, and it worked fine for the Necromancy part, but for some reason the pop-up asking you what you would like to build in a city would allow you to select Hero units that you cannot actually build! (you could only select them from that window though, if you did an Examine City option they wouldn't show as available.
Till I have time to devote to tracking down the bug, if you install my MODCOMP, then install WorkerMod over the top of that, everything should work fine. I tested for the Necromancy crash and that didn't happen anymore, and by doing a full installation of the MODCOMP (instead of just the DLL) it clears up the strange Hero issue.