Same as it's pretty much always been. VHF is simulcast on Acadian 1. Nobody has ever made an conventional connection with "Acadian 2" (exactly what it's called, NOT tactical, all it is used for mostly is internal business and some occasional bsing) that I'm aware of, so I guess it's a dedicated TRS channel only. Either way both are highly annoying to me so I rarely ever listen to them.
155.34 is pretty much only ever used by LifeFlight 2. Even then not always. LF is the only ones you'll hear talking to a hospital too. I can only assume Acadian uses data links, or Southern Linc maybe, for patient confidential comms.