Make Room for the Vocal
Vocals and guitar work together. Since they both live in the midrange, getting them to play nicely with each other can be frustrating. But with some clever mix moves, you can retain the clarity of both while letting them step up as the arrangement dictates.
Sure, you can use EQ, panning, and automation. But there's a better method to make the guitars and vocals complementary without getting in each other's way, even if it is a little more complex.
There is only so much sonic space. So making sure you have the equalization and levels right between the guitars and vocals is critical to making both of them sound great. So how do you do this?
Multi-band compression.
Since the guitars will likely be panned to some degree out of the vocals' way, the easiest method to make room for the vocals in the electric guitars is with EQ. I like to use a broad but gentle bell-cut in the 800Hz-3kHz range in the electric guitars. I find this gives the vocals dominance in this range.
But easiest usually doesn't mean best.
This part of the frequency range is where the guitar "lives". By doing something as static as EQ, you're taking that away from the guitar for the entire song. Try sidechaining the guitars to the vocals with a multi-band compressor around 800Hz-5kHz. This means you're only taking this part of the frequency range away from the guitar when the vocal is active. When it's not, the guitar will have the full frequency range in the mix.
Subtlety is the name of the game here. Making sure that there is space in the mix for the vocals is crucial, as they are arguably the most important element of every mix. If you don't work to make them fit together, you can experience things like frequency masking and a lack of definition in guitar and vocal tracks, which translates to the mix overall.
Sure, you can do a combination of EQ and automation. But by using multi-band compression you combine all of this into one easy workflow that works throughout the entire song.