Looking for replacement for ultra trainer

32M, 1m90 96 kg. Training for ultra (53k - 1700 altitude).
Currently at 50-60km/week, looking for replacement for my daily runners. Mainly using Hoka Mach 6 now but my calves are being destroyed by them. Previous Novablast 5 (ok-ish) and On Cloudstratus 3 (very happy about these)
What would you recommend?