I like Harley because she's clearly far more capable than anyone gives her credit for.
I also find it kinda weird when people idolize her and Joker's relationship.He's tried to kill her/left her to die on multiple occasions and clearly cares more about Batman than he does about her. Those shouldn't be relationship goals. She's far better off with Ivy.
If you want the ideal relationship of two really fucked up people, look at Gomez and Morticia Addams. THAT'S an ideal relationship.
Harley x Ivy is the OTP. The Harley ongoing comic is a really fascinating take on the character and they 100% know that her relationship with joker is terribad toxic. Plus Harley interacting with heroes is always fun. Also, I would like a Harley and [character] comic a la Spider-Man Deadpool.
EDIT: Raven. I want Harley and Raven. That would be amazing.