Baritone sax feature: This requires someone with high skill, who is willing to let go and delve into sonic worlds beyond more traditional jazz language.
The flute in tenor 2 is very minimal and completely optional. But, the doubles in the first two reeds are important. If finding an accordion player is completely impossible for you, vibes is possibility, and while a completely different sound, it could cover the parts, bringing a different sonic world. For the guitar, pedals for ethereal affect are very important. The guitarist must be geared for that. (no pun intended).