My understanding is you want SC to explode before the Ring, since SC's explosion is fed by SC's absorbs, and then that explosion feeds the Ring's explosion. So, you get a big boom from SC, and then another bigger boom from the Ring.
But if the Ring goes off first, it does not benefit from SC's absorbs, and it won't benefit from SC's explosion (because it hasn't happened yet). So what you end up with is a very weak Ring explosion.
As i said, that's my understanding. Please correct me if I'm wrong.