I'm interested in this mod http://www.moddb.com/games/heretic/addons/the-wrath-of-magic
. I contacted its developer, he still continues its development, but only aims for 1.86 engine.
The last few days I have been trying to build 1.86 for Linux, it was quite a quest, but even when it finally compiled without any error messages, it still wouldn't run.
So, any chance that you could look into why whis mode crashes modern versions of the Doomsday engine?