So I'm speaking to those that don't play arenas and large stages and don't have a soundperson with their finger on your slider or automation console making sure every solo note is heard, just using a volume boost to get to proper solo levels "like the album" (which is normally right up with the lead vocal and normally much louder than the rhythm volume).
Nothing sucks more to me when hearing a band & the lead solo starts and is some distant sound in the background you can barely discern. Nowadays clubs with lazy sound men that ask me "don't you have a boost?" that don't know your music and will start turning your solo up halfway through when they finally comprehend it's happening& if they're not chatting with someone, you are expected to boost your own solos. (At the risk of red lighting the console).
From all my years doing this I have found your solo volume under these circumstances need to be MUCH MORE than you think they are in your studio setting them up. I'll set up a boost when programming and go "Wow that's plenty" and live it is about half what I really needed. When I return home after a solo volume was properly tweeked for live, it shocks me to hear how much it really needed to be. I have learned a lot from doing this over 1,000 times.
Wondering...How many DB do you all boost for a leads? ( I realize clean and dirty leads take different amounts) I'm planning on using rig volume to do this.