Yes around 40 FR was best for non-Conviction rolls IIRC. Conviction can be dangerous but after playing last RFL with them I still preferred being healed by Hydras almost all of the time. I used Hellmouth also with DF and one FCR ring, though indeed having lucked with a 2/20 cold amulet. Still, DF with 2/10 ammy and two FCR rings also works. Or you know Viper/Ormus.