When you're tanking JoL the -ga3s are the only damage you take (unless your summons puller sucks and you get sharks to rape your face) so getting hit a little and being able to toss out Cure IVs for hate is always a bonus. I don't have massive amounts of Jailer tanking experience on RDM but managed so far with Lamian Kaman, Resentment cape and AF2 hands without ever being nowhere near dying from magic attacks. JoL's -ga3s hit for about 250 through stoneskin and it nukes so slowly you'll always have stoneskin up.