also I think the side melee Epyon combo is more like 4B 6B 5BB 6B 2AB or something like that, I forget. It's on the wiki anyways, buried beneath a trillion 8B ND 8B and 8B AC 8B combos.
Honestly just learn the [8B 5BB]x2 > 2AB combo and you are in good shape as far as doing damage goes, everything after that is just movement and positioning to actually hit someone.