Well, I'm kinda separating the various ranks of gods based on what level of abilities they can reach.
Demi-Gods can use free actions and a single one mote action, for example. Demi-Gods share one of your domains (Your choice which one).
So, for you, the seven deadly sin goddesses you made would be Demi-Gods who shared the god that made them's (The sin one, right?) domain of sin. Most Demi-Gods personify minor aspects of a domain, though you may choose to not have them do so. (No-Domained)
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather