For best TC Harms - Use a mono vocal track that is dry, no FX etc. Use the Maj chord instead of Ab6 etc when processing the harms. Throw in a 7th chord if there are more then 2 bars of the SAME chord for different harmonies.

Generate each harm to their own track, then edit them with FX and pan to blend better in the mix.

I don't know about audio harms to notation/midi, sorry.

Trax