The F/T/C can emulate the Barbarian as well. JJ's armour is 5% better than the Barbarian's innate physical resistances. The F/T/C can wear the helmet too. Since F/T/C can only use blunt weapons, it will be safe to assume that they will want to use Crom Faeyr. Even if they do not use Crom Faeyr, they still have Draw Upon Holy Might and Righteous Magic( not to mention a boost in HP, since this will be lacking).
However, Good-Aligned players will not choose any of the evil paths, so I will assume that as a non-option. Evil-Aligned players are free to make full use of it though.
It must be noted though, that Barbarians will have much more HP and Rage. The F/T/C requires more management too, since you have to cast several spells before you attain immunity.
I still find it inane though, that you can heal through physical damage... ...
"Hit me Balthazar! Hit me! Heal me!" 