I’d vote “DSI Mopho SE + Waldorf Blofeld Desktop” just because I have a Tetra and a Blofeld Desktop.

Tetra is hard to program, but you’ll have plenty a knobs to program the Mopho, so that issue is moot.

Blofeld will sometimes bug out if you have multiple complicated instruments playing, but it sounds like you’ll only be utilizing one patch at a time, so you should be fine.