I’m not sure the Spesh grid casings are any stronger than the Maxxis exo ones you were using.
Have you considered rim inserts like Rimpact? They don’t add much weight but can really help stop tears (apart from sharp rocks that just poke through the top IME).
I’ve just started riding an Eliminator (in the black diamond casing) on the back of my enduro bike. It does roll fast but it might be a bit of a dry conditions tyre.
Interested to hear if the new Spesh rubber compounds are better, the previous ones were very hard-wearing but not particularly grippy. So the old Butcher was treacherous as a front tyre IME.