This is how luck works. I fully geard both of my 90s on Hell Mephisto. But running him for days was rather necessity, then fun. Now I mostly run Pits and Cows for runes and key bosses. Half runes so far, like Cham, Sur and Gul, but looking forward for Ohm, Lo, Ber, Jah. I found my Tal Armor off random mob when doing forge quest for Necro. Tal Ammy off Mephisto minions, 3x Maras off Cows.