For what it's worth I love my Black Dog in a 26.5-28" multiscale baritone with 14-70 strings (6-string). Transposing that, your guitar is like mine but with 2 extra high strings and no fanned frets, although the woods are marginally different (mine is a Maple/Bubinga/Wenge/Bubinga/Maple neck-through with Bubinga wings, Wenge top and an Ebony fretboard. String through. The Black Dog gets me to brutality on a 5150-II with no additional boost (although I'm getting a bloody murder, if it's been sent yet..., to boost in front of the amp to tighten things up a touch - not that it needs much more tightness, but hey I'm a tone hound!). The Black Dog is fairly bright in my guitar, which is very mid-heavy, so should cut through mahogany beautifully.
There are people out there using higher output pickups successfully on baritone scale length guitars, but I followed Tim's own advice and went for the lower output pickup, and am very, very happy with it!
Roo