What would make a better base for a character that makes a pact with a powerful couatl for power?

[Masalic]

Right now im torn between a Wind oracle or a stormborn sorcerer.

[Bjørn Røyrvik]

Rainbow Servant is the traditional choice. Note that because of the tradition that text trumps table, they get full spellcasting.

Of the two options you present I'd go with the Oracle because it fits better with 'getting power from external sources' than Sorcerer.

[Mysterious Stranger]

You might want to take a look at Cihua Couatl If so an Oracle of Life or Battle might be more fitting. Personally I would probably go with life. Oracles have proficiency with simple weapons so using a short spear works well with the theme.

Other than being able to fly I am not seeing any connection to air and wind. Neither Oracle of Wind nor Stormborn Sorcerer seems appropriate. The fact that Couatl cast cleric spells makes the Oracle more appropriate than sorcerer.

If you do go with Cihua Couatl as a deity a Cleric or Warpreist might work.

[Masalic]

Mysterious Stranger wrote:

You might want to take a look at Cihua Couatl If so an Oracle of Life or Battle might be more fitting. Personally I would probably go with life. Oracles have proficiency with simple weapons so using a short spear works well with the theme.

Other than being able to fly I am not seeing any connection to air and wind. Neither Oracle of Wind nor Stormborn Sorcerer seems appropriate. The fact that Couatl cast cleric spells makes the Oracle more appropriate than sorcerer.

If you do go with Cihua Couatl as a deity a Cleric or Warpreist might work.

I'm using the more irl reasoning as quezacoatls whole thing was being the god of rain and wind and there are a lot of coatls in pathfinder who have similar powers

[Mysterious Stranger]

If you are drawing power from a divine source of rain and wind an Oracle of Wind is more appropriate. Oracles also get healing spells which fits. The elemental imbalance curse can add in a few lightning based spells so that may be a good choice for this character. Oracles revelations tend to be better than sorcerer bloodline powers.

The Oracle looks to be the better choice.

[Dragonchess Player]

Several other choices could also work:
1) Aeromancer arcanist
2) Filidh or thundercaller bard
3) Planar extremist druid
4) Shaman (possibly animist, benefactor, or primal warden)
5) Totem channeler skald
6) Summoner (possibly god caller)
7) Witch (possibly hedge witch, hex channeler, invoker, and/or pact witch)

[Java Man]

Maybe spirit summoner archetype of summoner, wind totem and some celestial eidolon.

[Melkiador]

Air kineticist?

[Azothath]

hmmm... rather than a pact with a powerful spellcaster why not claim the character you are creating is one of their students/acolytes or a worshiper(if it is a deific creature). A pact would imply an agreement or contract of sorts like a paladin's oath or where the supplicant provides some resources to the couatl in return for some spellcasting or magical boons/assistance.

[Melkiador]

Java Man wrote:

Maybe spirit summoner archetype of summoner, wind totem and some celestial eidolon.

I should have mentioned that I really like this idea. Spirit summoner doesn’t get enough credit since people dislike the class so much.