The Ondina is actually out of the question because that itinerary is empty. But I actually found a third option on a newer Phinsi called
Jelajahi Laut, this and the Neptune One both say they spend a few days in the Dampier Strait (Blue Magic, Cape Kri, Melissa's Garden) and the rest of the time around Misool.
The issue with the Jelajahi looks like the only cabin available is a small split cabin with 2 other divers. This may be a bit uncomfortable for 10 days but I'm not picky. I can't find any info on the Neptune One online but the itinerary is similar, with one less day in Misool and on less day in Dampier.
I found out
@Dan is actually on a Banda > R4 LOB right now which would explain his silence. The itineraries I posted above do both "Central" R4 (Blue Magic, Melissa's Garden and Cape Kri are all on there) and then mostly Misool. Would this be enough to cover the main sites for north/south? Or are there more sites further north I should not miss on the longer trips?