So why don't you just execute a 3of3 where each seed is generated using a unique methodology.
1. Cut up bip39 word list into 2048 pieces, mix well, and select one by one until you got 23words picked ...
True there are many options. I’ve never tried the cut up BIP 39 word list before. I guess I’m also just self assessing that just using the RNG from multiple devices is perhaps more random than a badly executed manual method.