A trusted friend has also recommended the TX4, it’s on my short list. They look solid.
My only concern is that I’ve never been able to fit any La Sportiva products so far…the last is usually too narrow, at least in every trail runner I’ve tried. I like everything about what they offer, I just can’t get a fit. Maybe the boots will be better, I’ll give it a shot.
I’m in a crappy situation regarding shoes right now…The Altra Tushar has my curiosity because generally, Altras have been the lesser evil to deal with my issues. They are likely soft for a crampon and weight on rough terrain but I’ve got a lot of compromises to make…
I’ve got screwed up toes and definitely need a wide toebox…like Altra wide or 2E minimum with no real taper. But I’ve also screwed my heels from abuse, a lifetime of being barefoot a lot, and tight Achilles (says the podiatrist). I now have Haglund’s Deformity in both heels. It’s stopped me from running but I can still hike big miles. Until I get surgery (which involves detaching/reattaching the Achilles, ~6 month recovery and only one heel at a time…oh joy!), I’m living with these bone protrusions and inflamed bursa if anything rubs too much. Stiff heel cups are trouble…and Altra’s generally have little structure in the heel vs other brands, so they work.
Might have to go with the RSM mids still, just exploring stiffer options…but hell, if Otzi the iceman was killing it in something like these, how can I not make due with an Altra?!

Probably too much info here…but hey, quarantine and all… : ) Thanks!