Yes, gain staging isn't always easy to get right, even on monitors TBH but of course they will definitely help you to have a different perception of the Mix and should make levels easier to adjust. That said headphones can be really helpful as well and reveal things that monitors won't, so both are complementary tools in the end.
Looking at your channels levels, it seems that you're taking care of keeping some safe headroom right from the start. This is a very good habit IMO. Many people start with their 1st channels like Kick & Bass too loud and then quickly hit a wall because they make their monitors & headphones struggle to reproduce the sound and it's even harder to adjust level then. So keep this good habit
Sometime the channel fader won't be the 1st or right place to adjust volume. It's good to check your sound source as well and to use your plugins output levels or to add a utility device after the plugin to get more control.
The goal is to keep a "relative" balance between all channel faders : if you're take a look at the all mix and see that you have some channels faders really set too low or too high, then try to adjust the sound source before the fader.
If you haven't watched this course from Phil yet, I highly recommend to do so, plenty of solid tips & good habit practices in this one.
Understanding Mixing Fundamentals with Phil Johnston
Cheers and keep it up !