I'm highly optimistic and used my sphere frog and imps on Grahdens because I think he is a great leader for boss battles, so I hope once he gets his 6* evolution (however far away) he will continue to be of use in this role.

Here is what I want to see:

Leader Skill: 25% to all parameters & 30% reduction in damage from Light and Dark Types

BB: 18 combo powerful Light and Dark elemental attack on all enemies & adds Light and Dark element to all allies' attack for 3 turns

SBB: 30 combo very powerful Light and Dark elemental attack on all enemies & boosts critical hit rate (50%) and slightly increases BB gauge for all allies for 3 turns

Stats: 6112 HP / 2100 ATK / 2000 DEF / 1800 REC

With this I feel like he would be the unit we all hope for him to be. What do you guys think?