Is there a forumla for what hero levels equal what amount of garrison points? Like for example my level 60 Pumpkin Duke adds 96 garrison pts but my level 80 Painda only adds 81.
it's not actually based on the hero class, it's based on the talent level:
eg Serpent Queen lvl 80 talent 3/9 is worth 170
Pain-Da lvl 80 talen 1/9 is worth 81
Yeah, each level in the skill add some points to the unit...the complete data can be found on the wiki: