All of those are Alnico 5 magnets.I am a little surprised by the low output concerns when using a HBOD.
It's my favorite pedal... so dynamic & it produces fantastically raw rhythms.
I've used the following with pups:
Lollar Vintage T: 7.4k
Lollar P90: 9k (or thereabouts)
Fender Wide Range Seth Lover from 70's: 11- 12k range
I also use a Harmonic Design S90 & am guessing the output is around 8k or so (anyone know for sure?).
Bottom line is that the HBOD sounds wonderful with all of these when driving a few different 6V6 & EL84 amps.