Sure. It sucks to pick a move because you think it's cool and then you can't figure out how to actually use it effectively, or can't find a good opportunity. So with that in mind, here's a few ideas for making Prophetic Curse work:
1. Straight up sabotage. Without using any moves, specifically, you can create your own secrets, then reveal them and add a curse. Steal something important, hide it somewhere almost in plain sight, then reveal it's location. Voila!
Or, get even more fancy: Leave a note for the hardholder's daughter, "Meet me in the basement of the old mill." When she shows up there, you lock her in without showing yourself. Then when the hardholder is looking around for his daughter, you show up and make a pronouncement: "Someone locked her in the basement of the old mill! People are turning against you because of your poor leadership, you're cursed!"
Or go simple, like you cut the fuel line in the Chopper's main bike, then you tell her about the sabotage before she finds it herself.
2. Use manipulate. Set yourself up as something of a confidante, and then manipulate people to tell you their secrets. You have a family, and they want things, like obedience for example, and you can use those wants as leverage against them. You do what they want you to do, and in return, they tell you things you shouldn't know.
3. Use read a person. Talk to someone. Are they lying about something? Snoop around, find out the truth. Maybe what they're really feeling isn't something they want to admit to, like they love or hate somebody, or they feel guilty about something. What do they intend to do? Something they shouldn't be doing, perhaps? It might just be that easy. Or maybe they wish you'd keep your nose out of something? Now you know where to snoop around.
Or the best one: "How could I get your character to tell me a secret?"
3. Open your brain. You've already got weird+3 after all, so check with the maelstrom and maybe you'll get something tasty.
4. Other moves. Two of your improvements are moves from other playbooks. You can try using Visions of Death, Deep Brain Scan, or Things Speak to learn secrets, or you can try using moves like Hypnotic, Oftener Right, or In-Brain Puppet Strings to manipulate people into revealing secrets to you.
5. And finally, stealth. Sneak around trying to observe people doing private, secret things. Make the MC figure out what rules to use for that sort of thing. Maybe you'll be acting under fire a lot, or maybe you'll be reading a charged situation a lot, having made it charged by sneaking into it and trying to stay hidden.
That's about all I can think of right now...