Where are you lurkers coming from?
Zoatebix, thanks muchly. That makes a ton of sense. Setzer it is then...
Fieari, about summons, I already mentioned that I'm going to use three different types. The summoner will have all three available to himself (otherwise I doubt a summoner could really have a full-out spell list). I'll reiterate, the three types are:
1) Normal D&D summoning "1d4+3 celestial chocobos" with a thick summon monster list of creatures that can be brought into a battle.
2) Dungeons and Dragons summoning (using the variant on page 96 of the 3.0 DMG). This grants the caster the ability to summon named creatures with thier own unique ability score arrays. For instance, saying we wanted to create a mock up of Rydia from FF4. Her "Summon chocobo" would summon a specific chocobo that is somewhat above average.
3) Final Fantasy style "instant effect" summoning.
The second variant is probably the one most similar to FF10 summoning. "Big" summons that join the battle to aid you for a while. Thing is, summoning these will have limited options of which creatures are available, and the material component cost for these spells will grow exponentially with power.