(Disclaimer: I'm much slower at Roux than the other big four methods.) COLL is better than 2-look CMLL and it also helps in your CFOP solves, but there are a couple of CLL cases that are way better when you don't have to care about EO, like F R U R' U' F'. (You'll probably figure out which CMLL-specific algs are worth learning as you get through COLL; bad COLL algs sometimes get a bit better when you can destroy EO.)cmll: I'm just using 2 look, is that good enough for sub 20? I don't feel like full cmll is worth it because I'm still going to main cfop, would learning coll be better than 2 look cmll?