I’m also mildly interested and looking forward to what others suggest, maybe as a way to get myself back to attempting some more adventurous stuff.
I haven’t seen them in person but from pictures the AAZIS are completely open in back, so there’s no protection from pedal bites on the calves.
G-Form pads seem popular around here, esp with those who find the KH Percussions to be stiff and bulky.
SixSixOne knee/shin guards were also popular with unicyclists for a while. They seem to change model names a lot but the 4X4’s got mentioned a lot. “Rage” and “Exo” are models I’ve seen around lately. Race Face Flank is another brand that’s out there.
Existing thread here btw, but not many updates recently there: