Rings split 2 ways, STO doing some stuff, Mimeophon, Clouds and Zverb all on effects duty, Sloths modulating Ochd, Marble in control, ST Modular WAVE modulating some stuff.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.