Unless there are higher AC Beastlord wearable boots in PoP, these are the second highest AC Beastlord wearable droppable boots after Barbed Dragonscale.
They also have nice stats for a Beastlord, and my level 53 Beastlord is very happy to have bought them in bazaar for 1500p, particularly as he should be able to sell his old Iksar Hide boots for not much less.
A nice cheap upgrade (as nobody else wants them), hoorah.