Sure, both OT code and hierarchy is simple if font is lightweight, but it gets confusing real fast when there's locl, case, calt, liga, dlig, smcp, c2sc, swsh, frac, ss01-07, sinf/sups/subs, numr/dnom, lnum/onum, pnum/tnum etc. to work with.
I know that everyone's have different methods and it varies from font to font, but what's your usual strategy? Do you put most common features at the top or vice versa? The ones that affect the most glyphs?