You also have "Circle Magic" in the FRCS. Contrarily to the system in Relics & Ritual, Circle Magic is an ability granted by prestige classes, so you need to be a Red Wizard or a Hathran Witch to have access to it. I prefer the R&R rituals rules myself, but if you don't want 'em...
I don't know how the ritual rules of Spells & Spellcraft work.