I don't think that getting 2+ is a reasonable goal for most non-lucky cases.
The two best multislotting sites are Felix Sebastien's site Absolute Mind and cubeloop.com. They might have somethings you are looking for. I think Felix originally formalized multislotting, cubeloop has a lot of algorithms (but many are unreasonable for speedcubing). The best thing to do would probably be look at the cases on the site, see which ones you want to learn, think of some of your own cases and find your own algs with Cube Explorer.