You should be able to use them side by side without any problems. Just make sure you disable the Asari in Rimeffect races so you don't have duplicates. When you start a new game, you should be able to switch over to using just this mod.

Thanks!
By "disable" do you mean not generating their settlements (with Orion's faction control), or is there an actual switch in the mod? It's lazy of me to ask instead of checking, but I want to be 200% sure.

This mod includes settings to turn off any races you don't like or want. It will disable both the faction and pawns from spawning.

Awesome, thank you for the help and of course for your great work!

EDIT: Actually, it seems that disabling Asari doesn't prevent Orion's mod to try to spawn their settlement. Just in case you don't know. (Of course I simply said no.)

Yeah, it won't stop that mod from trying to add them after the fact, but it sets the spawn chance and spawn count to zero, so unless you use something like Orions mod to manually spawn them in, they will not spawn.