You need TES4LODGen to use RAEVWD. Period.
What sort of graphical glitches did you encounter?
Battlehorn castle appeared black from a distance, Cloud Ruler Temple appeared to be floating and only half attached to the mountain, and the main issue was that anything added or modified by UL still wouldn't pop into view until I was very close. What is the ideal order in which I should install the UL Compilation omod, the RAEVWD omod, and run TES4LODGen?
This will also help: http://tesnexus.com/downloads/file.php?id=27495
I read that the UL compilation omod automatically installs the correct LOD, is that incorrect?