guess i've been lucky. only major blisters are boots that were slightly too large. I do get some hotspots from time to time. Also stiff boot guy, one of these days I'll switch to plastic. The pair that didnt fit was terrible how bad the blisters were and ended what little of a sheep season I had left.
I also pop mine and try to take care of things from there...probably not the right way but it works for me. Basically anything to keep the boot from rubbing on it be it mole skin duct tape, will all work. I dont directly apply it to the area....as much as around it.
I find liner socks for some reason make my feet slide, creating more blisters/hotspots than just one pair of straight wool. Currently wearing Lowa's, have worn the Meindl Alaskas and Canada's. They also make my feet sweat more both in my old basic boots and my hunting gear...had issues so stopped.
If they are the Alaska's or the lowas or something similar with the higher rock guard around them, dont expect too much movement in the leather. I havent messed with the lasportiva's yet so cant comment too much on them other than friends that have them love them for early season sheep! Much lighter weight, rigid, durable.