I know usually when you create a PC you have to take the archetype at creation, but if you wanted to multi-class are you allowed to take the second class and archetype? Since you are still replacing the abilities from that class before you use them?
No I was going for a flavor build... Sin Eater Inquisitor with a necromantic Scarred Witch Doctor. I know not optimal but the concept seems fun and we have a big group so I can RP with it and not have to worry about maxing out damage or anything.