In the end, four of my five players decided to play Human Cleric/Psionicists and one is playing a single class Psionicist. The NPC of the group in a Human Preserver/Fighter/Psionicist. Details below.
1. Player: Tyson. Character: Human male, Fire Cleric, Psychokinetic.
2. Player: Mike. Character: Human male, Earth Cleric, Psychokinetic.
3. Player: Clyde. Character: Human male, Water Cleric, Clairsentient.
4. Player: Bumper. Character: Human male, Air Cleric, Psychoporter.
5. Player: Justin. Character: Mul male, Psyhometabolist.
6. Player: NPC. Character: Human female, Fighter, Preserver, Psychometabolist.
After the players decided to play the four Elemental Clerics, Tyson said if they had a "Heart" Cleric, they could summon "Captain Athas".
Pictured below: Captain Athas