What's Roguekiller like?Hitman Pro, could be your second opinion scanner, given the fact that adoct also the Early Warning Score, could be a good ondemand scanner to have alongside a main protection,
In my rank of ondemand scanners take the first place, followed by Roguekiller, and Emsisoft,
is a good practice to use more than one demand scanner, sadly, even if I have a lifetime for Zemana, the lack of updates and potentially vulnerability make me step away from their product, in the past was really good.
I have it as a second opinion scanner, and if I got you correctly there's no point in switching to hitman pro?HMP is only a secondary scanner (ie Not Real Time), so no, there would be no redundancy.
But regarding your current setup- do you have MB in Free mode (2nd opinion only) or Paid (Real-time)? As a 2nd opinion scan keeping MB on your system won't hurt anything, and you can have fun wasting time by doing a scan. If, however, you have MB in Paid Real time mode I suggest you uninstall it as it adds nothing to BD TS except a false sense of security.