Either one token per radical (as some minimalist proposals for CJK Unicode normalization suggested way back when) — or just map everything to sense-annotated pi

Either one token per radical (as some minimalist proposals for CJK Unicode normalization suggested way back when) — or just map everything to sense-annotated pinyin, i.e. what you type into a Chinese IME to get ideographs out (and which is also, I think, what Chinese text-to-speech engines do internally as an intermediate step.)