And Moonvine is better in your weaker squads since they will fight generaly longer to trigger that 20% Skill Up Chance and Solar Blast is something you want to use, to help out your weaker squads. Moonvine may have generally weaker stats for a 5*, but the Lvl 5 Skill and 4 Slots help her and the abilities go well with her low stats. Convalaria is like the total opposite with absolutly useless skills for the base power she has, ignoring the TP Formula.