[maus]

No, the nightmares are not the issue. It can be reproduced in any area by just creating creatures of 9XE-type. For example: create 9XE1, dialogue starts, spells are cast; create next 9XE1, dialogue starts, no spells (local variable is already set); create next 9XE1 dialogue starts, creature disappears. I tested this behavior 5 times (well only with 9XE1,2 and 3) but it doesn't matter in which order they are created or if I kill one of the previous ones or not. 

I finished the quest no matter, because I can CLUA the creatures afterwards. Only issue is that I have to adjust the main variable via CLUA.

And don't mind. I don't think that your mod is the issue. I suspect that just the large number of mods might be an issue or a specific mod that is altering effects (somewhere else) or a hick-up of a script during the conversion process of EET_end. Who knows...