Imo you can implement all the variation you could need into a HIT routine. You mention Dorian...he never varied from HIT style training. It is one thing to take an "active break" and back off for a bit but I don't see the need for a BBer to train any style other than HIT.
You can train as you please and as long as there is progressive resistance then you will progress. I just believe HIT is the most efficient way to go about it.