I don't like Ryleigh at all, but I do think it makes it more feminine. And I'm not a fan of
Kelly in the first place, but if I were to mutilate its spelling, I'd go with
Calleigh.
If I were going to use
Riley, I'd go with either
Reilly or
Riley, probably the former. I'd most likely only use it as a middle name, anyway, and as honouring. It's my grandmother's maiden name, but there are plenty of other ways I could honour her without using that.