Even though I optimistically called one type of combo a "Rib Combo", that's not the best way to mimic knit rib. It works much better to do it sideways in tunisian crochet. However, the reverse stit.
No-roll Tunisian crochet! Just made a very small test and it seems to work. At least it's better than the normal way. -- She also mentions MIkey's Tunisian crochet, as a non roll bottom piece