I was thinking about trying i-cord. Looks simple enough, from the video. Could I do that on circulars, just switch the stitches from needle to needle? I've done kitchener stitch before, but only once when I made my one and only sock lol. I've done a little bit of lace, but nothing very complex, so that is definitely something to take into consideration. And I've been meaning to try entrelac for a while, also a good suggestion.
Thanks for all of the great suggestions ya'll!!