User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-26201440-20160408014444/@comment-26388464-20160409200535

I'd say Allanon, because he does so much more then just buff elements. He has an instant BB gauge booster, BC boost on attack, element damage reduction, weak element damage buff, OD fill rate, OD filling, max HP boost, etc.