Okay can be used as is, usually written *ok*, or can be translated to *d'accord*. If this ok is skeptical, you can prepend *ouais* or use *Ouais* alone:

> Ouais, ok...

There is no straight translation to the idiom "what's your point" but here are some suggestions about what could be used in a conversation:

> [Ouais, ok, mais] tu veux en venir où ?  
> ...tu veux prouver quoi ?  
> ...qu'est-ce que tu veux dire ?  
> ...qu'est-ce que tu cherches à démontrer ?  
> ...