I believe his buffs should reflect and amplify his top asset-- raw power at any cost. He would, unfortunately, be stripped of most other things, but this is to make balancing room for an additional mechanic I did fancy for a while now-- dash/run invulnerability to most attacks. This is to reference his 'invincibility' in Zelda games. This peculiarity serves to ensure that the opponent does not become haughty in the thought, "Look! It's Ganondorf, let's pelt him with sharp objects from a distance until he is too weak to protect himself!" This would also enhance his mind games, and force the opponent to attack him during or just after his offense.