
Mount to Coast
H1
Versatile road-to-trail, but struggles on wet, technical downhills.

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I made the mistake of buying two pairs of peregrine 12 a few years ago. Both got warrantied within 100km and both 13 replacements broke immediately as well. Then they replaced them with one pair of peregrine 14 and between all of them together they lasted shorter than my peregrine 10s
I’d believe it. I love the feel of Peregrines but their quality control/durability is honestly pathetic. I owed 10s, 11s and 12s and whilst Peregrines were never really hitting those 600km+ durability that other shoes got, they tend to be cheap enough to make it worth while. After my 12s hardly lasted 300km I called it quits on Peregrines until I hear there are improvements to their design.
You’re asking for two different things - a shoe that is best at running is not going to be the same as one that is best at hiking. Also there is no a single “best shoe” in the first place. Are we talking technical trails? Something smooth and flat? Wet? Etc. Do you want a “race” shoe that has a carbon plate (which would be terrible for hiking but are often among the “best” for trail running competitively). It seems to me you’re not looking for the best shoe. You’re looking for a good jack-of-all trades shoe. In which case you should opt for something with stability and versatility but can go a little fast too. Maybe a Hoka Speedgoat 7? But even then you don’t want something with too much stack height. Maybe Norda 001As, although they’re expensive. You could get away with some Saucony Peregrines, but historically they’re not great on wet rock and their durability can not be great if you’re doing a lot of more technical rugged trails.
What’s your distance? I wouldn’t want to run an ultra in a pair of Peregrines. But a half marathon to 30km? That’s do able.
Sadly with the 13s they changed the sole, and they just don't have the grip of the older ones. Which is a shame, because they were a great shoe. I went through several pairs before I had to find something else.
I loved the older Peregrine's but the new ones quality is absolute trash. I've moved over to Nnormals and don't see myself going back. Tomirs will probably fit your foot best, Kjerag is more "like" the Peregrine IMO (stiffer foam, lighter) but you may find them tight. Good luck!
I've not worn the 15s, but have worn most versions from the 8s. They're my go to trail shoe ranging from a two mile loop to 50 milers, single day to multi day trips. Worn for river shoes, snow covered trails, rocks, mud, you name it.
If they aren't working, there isn't much you can do. I find that higher stack height shoes - the Calderas are 38mm/32mm in heel/toe - I tend to roll my ankles more and look for something closer to the ground. The Cascadias are 33mm/25mm, so your foot sits much closer to the ground, and you may be noticing this. I like Saucony Peregrines which are 28/24, about half an inch closer to the ground than the Calderas. Unfortunately, a lot of the max cushioning shoes tend to have higher stack heights. You can otherwise look for more "stable" and wider sole shoes, but too wide and your gait changes. Or, mid top boots for better stability. You can always keep the Calderas and use them on non technical trails.
Saucony Peregrines wides for long trails 4mm drop. I wear LP for every day wear.

Mount to Coast
H1
Versatile road-to-trail, but struggles on wet, technical downhills.

Altra
Lone Peak Series
Spacious toe box, but cushioning and durability are polarizing.

La Sportiva
Prodigio Series
Great technical grip, but unstable for some, with sizing issues.

Nike
Pegasus Trail Series
Versatile for non-technical trails, but poor on wet, technical.

Mount to Coast
T1
Lightweight, cushioned; but lacing and underfoot protection are issues.

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Salomon - Speedcross Series

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Hoka - Speedgoat Series

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Mount to Coast - H1

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Salomon - Genesis Series

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La Sportiva - Prodigio Series

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Mount to Coast - H1