Ok wait, I have a solution. Stay with me here.

Step 1: Purchase label maker.
Step 2: Reroll Lalafell. You'll see why in a moment.
Step 3: Pick THM as your base class.
Step 4: Use label maker to print 'Summoner' label.
Step 5: Affix label to the spot on your monitor where your class shows up.
Step 6: Level THM until you get your chocobo companion quest. Treat this as a class quest.
Step 7: Continue leveling until you can summon your chocobo into battle
Step 8: Buy at least 9999 greens so you never have to worry about them again.
Step 9: Summon your chocobo. THIS IS YOUR SUMMON. It is much bigger than you (because you are a lalafell). Chocobos have been summons in past games, so it fits the theme. Your chocobo can tank, heal, and dps to varying degrees. It has many abilities on various cooldowns. Also like past summons, it mostly does its own thing once you've spawned it. It is the perfect summon and the only one you will ever need.
Step 10: Get the BLM job crystal and continue leveling to 50. You'll receive flare and the third tier of elemental spells. This is your solid single target and massive aoe.
Step 11: Summon non-combat pet. This is your level 50 'summoner' perk that lets you temporarily have two summons out at once. Despawn this pet once you think enough time has passed.
Step 12: Submit bug reports that pet is bugged and cannot enter instances or raids with you.
Step 13: Wait until SE fixes the bug.
Step 14: You're done!