[Lamech]

You take a modular ability 5 point slot 5 points per level. Then add physical, magic, and only advantages. Add more limits if you like. Then you stack alternate abilities on that base. It introduces a new "rule", that lets you pay full cost for a number of the abilities in your alternate array (you pick the most expensive abilities you can), and you can have up to that many abilities active at the same time. Every ability (including ones powered by the modular ability), are supposed to take a point of FP at least.

Then it has a bunch of good advice and examples. This is in all honesty what makes the article good. So shell out monies or not. But its a good pyramid.

Anyway, to replace RPM... a witch is gonna be a lot faster. She's gonna have much more "blasting" power. No charms. Not as much need to obsessively prepare. But she'll probably have less versatility and less buffing power. I think it certainly makes a good addition, although I would probably go the witch route.