Ideas for using RoM for realistic or subtle magical gameplay?

Hmm... you could make a spellcaster in CAS, then you don’t need to go to the realm. Maybe just do potions? Less wands and stuff.

I think that there are clever ways of having a touch of magic, I’ll come back after I tried the pack myself.

You could play a sim that sells magic potions. Just pull the potions from the bb-catalog and sell them in a store. The spellcaster prefer to stay in the realm and have delegated the task of selling the wares. Then you can have a regular sim just briefly interacting with occult when the store is open. Could be a fun story.