A lot of people like dual cursed oracles, for good reason. However, the question remains... what's a good dual curse?
There's something like Blackened & Wrecker, which means you won't focus on being a weapon wielder but makes a potent debuff for fighter-types for the oracle's curse spell.
I've been looking at Wasting & Legalistic, because the problem of getting sickened for 24 hours when you go back on your word goes away once you're immune to being sickened at level 5. The oracle's curse is utterly destructive to bluffing face-types, and you essentially give up being the party face, yourself.
What's your favorite combo, and why?
Deaf (primary) + wolfscarred works for a non-face. Free silent spell and a natural attack is a pretty solid benefit.
Still, I'd probably prefer to go with either haunted or wracking mysticism primary for extra spells and covetous as a relatively harmless but flavourful secondary curse.
Lich + Vampire (both are corruption curses from Horror Realms).
The Lich curse makes it so that you're healed by negative energy and harmed by positive energy... and the Vampire curse does the exact same thing. You just need to decide which spells you want added to your spells known.