DynDOLOD works fine without NGIO, and I believe NGIO is prone to stuttering without DynDOLOD from what I read over on the comment section side of NGIO (I don't think the mod author has been active in a while, so there are a few members there that have been hanging around and being helpful). I get stutter with and without generating terrain LOD - and with just DynDOLOD without terrain LOD and NGIO, I get a steady 60fps and only dip for a second when it stutters when loading in a cell.
Not sure how relevant this will be, but my landscape textures and grass mods are relatively lightweight in comparison to others - I'm just going with the Cathedral Landscapes (with it's default grass) setup for now with Majestic Mountains with Rudy's ENB for Cathedral Weathers on top of it. I have an Intel Core i9-109000k CPU, 32GB of RAM, and a RTX 2080 Super. I've seen people with lower specs with a lot of heavier mods getting steady gameplay with the DynDOLOD and NGIO setup which is why I'm a bit confused.
But I'll give the WIP Instructions link a look and see how much it helps out and get back to you. Thanks for the link.