But why would you want to make a DD class heal the party, you are going to end up with a party full of MRD wil high DD and def and capable of healing one another, where does the conjurer fit into this party or another class for that matter ?
Gladiator - Paladin = Healing magic and Enmity skills.Nothing wrong with a Conjurer/Thief but it probably wouldn't be the best combination kind of like WAR/WHM.
Gladiator - Swordsman = Pure DD and a skill to allow equipping of Great Swords.