Having a level 32 Fighter, as I have, seems to be plenty, as he has maxed Strength, Dexterity, Speed, and Senses. His Intelligence, Piety, and Vitality are evened out neatly. I always give him Guardian Angel to protect him from damage and status ailments. He shreds enemies very easily. Also, he is quite competent in ranged combat as well (against the sometimes spawning ranged-only Savant Destroyers and Savant Minion).

Do you plan to actually get to level 50?

No. It's almost impossible. A level 35-40 party should be able to handle anything before Ascension Peak. Even then, AP will spawn level 40 Magma Scorchers and level 50 ArmeGazers, so it's hopeless trying to dominate AP.