Hi everybody, recently i got the materials to upgrade my 3* chars to 4*. But now i dont know who evolve, i only can get one to 4*. So i want hear your suggestions, the chars that i can upgrade are:

Allied soldier (magus)
Undead allied soldier (sentinel)
Biker eddie (the starter warrior)
Mummy eddie (sentinel)
Speed of light eddie (magus)
Wickerman eddie (magus)

The first two are my main allies in battle, also i have a carriege eddie (magus) of 4* that is my main eddie. Also i have completed the game in normal and i' am looking for finish battlefield and underworld in hard and madness. So what you recommend me?