So I take it that output size is within normal range? "Several GB" is a little vague.
My setup is mainly based around seasonal landscapes / seasons of skyrim, so I cached grass (all seasons and default), ran LODGen to create terrain lods, TexGen for grass/trees and objects, then finally DynDOLOD (seasons, grass, the rest defaults other than halved tile sizes) for all worldspaces. I use no additional worldspaces other than those provided by AE base game / CC content.
I realise there's a lot of variations with setups. I was just making sure the size wasn't as outragously large as it seems to be.
The regular log:
https://paste.ee/p/hCDGn
loadorder.txt plugins.txt