The Cad Bane episodes are around 50 BBY to 35 BBY from what I could tell. Bane's just a kid in the first one, spent a good few years away with his crew, then was in jail long enough for his son to grow to a similar age he was in the first episode.
I put the Ventress episodes in 17 BBY since it's implied that Imperial-class Star Destroyers are just now being rolled out (since they're still being built, with a Venator flying overhead). Since we see an Imperial-class at the end of TBB, I'd want this to be as close as possible to that.
Bear in mind that by the wiki's logic, that would mean it's around 18 BBY, though I don't agree that TBB Season 3 is set in that year. Around halfway through Season 2 is over a year after ROTS (Mayday's troops were sent out over a year ago), and I feel the events of that film have to be at least past the halfway point of 19 BBY given how much happens in that year prior to what we see in the film. So the end of Season 2 is the second half of the year. The tallies in Omega's cell I believe were equivalent to over 6 months, so to me it feels like it would be early 17 BBY, and therefore Ventress' episodes must be after this point
