My concern about pairing a Fast Track 1 with a fat bridge humbucker is about it lacking body, not so much about it lacking output. The limiting factor of it not sounding “humbuckery enough” has more to do with the aperture than the wind and this issue still exists with the hotter rail pickups, IME. In my SSS with an Area 61 in the middle and Injector Neck in the neck, the Fast Track 1 sounds very much like a humbucker, though I am shaving off a bit of top end and am using a larger tone cap dedicated to position 1 in order to give it the appearance of sounding fatter. Likewise, in my HSS I’m sculpting the Fast Track 1 in the neck position to have more of a single coil tonality in position 4 and more of a humhucker tonality in position 5 (positions 4 and 5 are both neck-only). Context is everything. So with all that out of the way I say go ahead and give it a shot.
To push back a bit on the Satch Track sounding “too fat,” it’s actually pretty tight, the problem is that it’s dull. It’s great with a lot of distortion where the distortion is filling out the top end. Cleans are perhaps better suited for jazz, though it still lacks too much articulation for my taste.