I'm nearing the end of Pillars 1 in my straight run through both games and I'm having a difficult time choosing which god to support at the end. Based on how I'm RPing the character, Galawain/Abydon/Magran would be the ideal choice but my main POE Watcher made that decision and I'd like to try something different. Wael seems appealing but I can't recall if there's any benefits - at least in base Deadfire - to picking it.

As the title asks, what reactivity can I expect for choosing Wael? Are there any noteworthy hooks in Forgotten Sanctum?

There is a conversation in the Forgotten Sanctum where you can bring up the fact that you disposed of the souls per Wael's suggestion.  That's about it as far as I am aware.  

hylea are the obvious choice

galawain are second

since dyrwood are weakened by the crisis significantly