You could certainly sacrifice it and THEN become Obscure, though - I don’t believe Destin’s is a requirement for Erzulie’s, is it?
The only Candle unlocks showing on the Seeking Road storylet for E-G are having St Cerise’s and not having the candle in question.
You can also sequence break a little if you are either from seeking past or if you have a rat of glory eat some of your candles. So I would assume this was taken into consideration.