I do a step even before any clip gain changes. And that is to clone the track and bring it into Adobe Audition and even up things by eye there too and check metering over certain areas. For a vocal track I often aim for nice even VU response where all the vocal phrases just peak up to 0dB VU. You can do all this without tampering with the vocal dynamics as well.
Then after that I get it into the arrangement and it is usually very close there. But some minor cuts and clip gain changes can be just the ticket for fixing up a few areas here and there. By eye as well. Now you have got a nice even vocal track without any compressors running over them.
I often place a limiter first just catching very high out of context peaks and taming them back a little. I send this now to the vocal buss and put its compression on there. Now that compressor can be a much lower ratio and it is working nice and evenly all the time with little actual gain reduction. This compressor just tightens and evens things out a little more. The low ratio ensures a big sound. It has a relaxed job now and sounds better for it too. And it does not have to dive on loud bits here and there either.
You now have a fantastic vocal sound, even, loud and powerful. You can afford to turn it down now. Minimum voltage max illusion that sort of thing.
Extra Tip: Reason why it is good to put your main vocal compressor on the vocal buss rather than the vocal track. You can manually ride vocals on mixdown at track level. Sometimes there is no better sound than this. It requires you to learn the song vocally. You are then pushing into the vocal compressor because it is later in the chain ie after the fader. It will be getting a more even signal if you manually ride it.
Also you can send the vocal reverb from the track which is before the main vocal compressor. This sends a more dynamic vocal signal to the VOX reverb. The VOX reverb gets louder on the louder parts of the vocal line will quieten down on the softer bits. This sounds very nice and cool in certain situations. The vocal reverb ends up with its own life and dynamic. All automatically and this saves you doing it later with automation. It sounds more natural too. You are hearing natural reverb decays rather than your automation false decays.