Hmm possibly I haven't experimented with elemental skills from the monster girls I've only been testing the abilities that would help in movement such as the maid,tanuki,aoe damage from minotuar, the ability that improve stats for a short time period like the elf warrior,the sleep skill from the succubus, the heal skill from the priestess, the immobilize skill from the lamia, and the oni skill which throws enemies away from you. Though just having the elemental monster girl abilities on standby when you're in a bad situation is not a bad idea.