I'm almost certain we will get 1 ability per 5 level increment for jobs just like we currently do.
55: Summon IV: Summons a supporting-type pet (Leviathan).
---Slot 1: Spinning Dive: Delivers an attack. Recast: 3s.
---Slot 2: Spring Water: Heals all nearby party members. Recast: 40s.
---Slot 3: Barracuda Dive: Delivers an attack. Additional Effect: Silence (1s). Recast: 30s.
---Slot 4: Tidal Roar: Lowers attack of nearby targets (10s). Recast: 120s.
-Enkindle: Tidal Wave: Deals water damage at a potency of 200 to all nearby targets. Additional Effect: Heavy (10s). Recast: 300s.
The reason I think this is so far XIV has pretty much copied the summons of RIFT.
-Wind is the best magic attacker used for buffing the owners spell power, causing both to deal additional damage, wind dmg to target and nearby targets and a standard wind attack.
-Earth is the tank getting basic earth attacks that increase enmity or force the target to attack it, AoE attack that forces targets to attack it, and a charge-in attack.
-Water is the "crowd control" (support really) used for basic water attack, weight, silence, and dispel with water damage added to all abilities but silence.
-Fire is the melee attacker. Don't know much else on its abilities yet, only 48, need to be 51.
Also this^.