One method of creating succulent containers is to start out big. For a large pot I’ve used everything from large pots to styrofoam containers to shallow wooden boxes and ceramic bird feeders. In it, you allow many succulents to grow and to clump together.
Once that’s achieved (6 to 18 months later), you then break up the whole into parts that you then re-pot. In the example here, one big pot of succulents became about 15, including one that’s medium size. Each has three to seven succulents in them that can now fill in the pot, with future pruning finishing off the creation.