Settings for acoustic guitar with pickups

OK, I know that one, it's a passive with a very high output, warm sound, slightly lacking in brilliance but good for steel strung guitars. But you need the ability to change the eq to suit your taste. Buy this:

It will give you access to what you need.

And (bearing in mind the aforementioned very high output) I suggest turning the gain down even more, you can make it up farther down the chain.

It is an electric, and the switch should be on INST rather than LINE, but having said that; no damage will result from using the 'wrong' one, in fact if you like it better more power to you.

No risks of damaging gear or yourself provided that you follow one rule (the connected musicians rule) gain goes down before you unplug or plug in.

Also, is it possible that if I monitor the recording while playing, the bass from the monitor is resonating in the guitar body, and compounding the problem? (Obviously, I can turn off the monitor if need be, or use headphones.)

Yes it is.

some built in mics for acoustic can have contour and bypass controls that need to be set, or they have dying batters that add all kinds of fun. I'm coming from the side of "I'm the guitar player, not an engineer and this is all voodoo." but my understanding is CSound hands on expertise with the scientific side of electronic amplification and can probably shed better light on your plight. (song lyric!)

Start by removing playback from the equation, monitor on headphones only. Take the 2i2 gain down (or up) to unity (approx equal to 7) judge the level using the headphones. When all that is copacetic use the pickup tone controls to even out the response. Remember that if you drive the input too hard it will affect sound quality.

Yes, the wiring order should be guitar>pure-preamp>scarlett>

And as you now have another gain stage ensure that all stages are as close to unity as possible, all except the last one in the chain. (On most devices with rotary pots somewhere in the vicinity of 7 is unity)

The amp you use on stage is a combination of pre and power amp, the preamp section provides the inputs you plug into and low level amplification (voltage amplification) to provide sufficient signal level for the power amp to work on. With guitar pickups especially the pre-amp has a significant effect on the sound you get, you will get used to that and you may want to experiment with monitoring via speaker, adding a little will 'warm up' the guitar. Think of it not as a monitor device but a tone control (with also a slight delay equal to the time it takes for the sound to get from the monitor to the guitar)

Yes, I have heard that before, but the version I heard was "Richard Wagner's music is actually much worse than it sounds", but neither version does justice to the man who once said "I previously stated that MIss **** is the worlds ugliest woman, I have since had occasion to meet her sister and would like to retract my earlier statement.

Ouch.

built in or aftermarket pickup?how is it set up?