Wah if I spam skills it messes with stats? 
no, didnt meant that, lif special attack (when shes loyal & grown up) mental change depend on lif matk. less matk = less mental change dmg
Effect: For the skill's duration, Homunculus's Maximum HP and SP are switched. Non-skill attacks are increased by the Lif's MATK value. Upon activation, Homunculus's HP is fully healed. After the skill's duration has ended, HP and SP are set to 10.
(this skill pwns)
Note: dunno if was fixed or not, but mental change have a simple bug that make it spammable (so lif hp/sp isnt reduced to 10), just rest/fwing/change area/bwing/teleport etc and mental change is usable again
irowiki said that it gets a stat boost from evolving
yup, they do