If your vocal sounds buried in the mix I don't think these tools are what you're looking for.
I'm aware of 'ducking' as a technique in commercial beat-based music, usually to let the mix pump and the kick punch through, and for voice where clarity and diction is important, like radio/podcasts etc,
but I don't think I've ever wanted to duck a mix to allow the vocal to be heard.
Although a vocal rider isn't going to compress anything, it will turn your mix down and/or vocal up.
If that was a solution, I'm thinking your previous volume automation would already have sorted the problem.
I mean, try it....it's how we learn, but I'm not sure it's the way forward.
If you have a wide-panned stereo effect on the vocal, like a stereo reverb or delay, try narrowing that for some clarity.
Sometimes I blend in a spare vocal take with the main one, and sometimes I'll track word for word harmonies, when the main vocal isn't coming through like it should.
Failing that, you could try muting each track one by one to see which one you think masks the vocal the most.
If everything sounds great without one particular guitar, for example, then do you need that guitar? Or can it be panned out of the way a little or thinned out?
Just a few suggestions.