Bottom corners
Build an oriented bottom face, or leave its last corner twisted in place.
Kirjava–Meep
A corners-first alternative. CLL/EG starts with an oriented bottom face and solves the other corners while ignoring centres. CLS admits a last bottom corner twisted in its slot. After solving all corners, finish the centres. A face that merely shows one colour is not necessarily a solved layer: permutation and the two corner orbits matter.