
MrSin |

Don't have to take fiendish heritage to take variants in PFS nor in most groups I've been in. Its a pretty old book, and taking a feat to swap out what you have for something of the exact same value isn't really feat worthy.
But yes, your correct that there isn't an angelic heritage but there is a fiendish heritage. I think fiendish heritage is from Bastards of Erebus, but Blood of Fiends also has variants and doesn't have fiendish heritage. I don't have either book on me to check though.