Better Vampire Mod and GTS mod collection

Hi everyone!

Wanted to ask if someone on this forum knows how to make Better Vampire 9.1 work with Gate To Sovengarde collection? RSchildren mod is included in the collection and making the collection ignore and then remove these mods makes the game crash, and the game in the whole picture is so much better with everything intact. I have a few essential mods I've added extra that I can't live without, and Better Vampire is one of my favorite Vampire mods, which I'd like to have. I have put it as late loader in vortex and RS mods as early loaders, but the BV mod still doesn't work in game, I don't progress into a fledling stage after feeding on npcs.

Any advice what I can do to make this mod work, or is it a lost case?