Athena: I am sure that medusa gaze of Perseus can’t freeze turrets but Athena spell can stun turrets. You can try it on hydra and the turret cannot hire anymore.
Minautorus: I have checked that minautorus doesn’t have poison resistance even with blessing but pandoras box seems to deal less damage on blessed minautorus. It takes age to kill a minautorus. I think it’s longer than killing a hydra lv 7 with 26k health and 50% poison resistance.