When you have lots of power on tap, do not mess with the gains. Keep the gains down otherwise you will run on a risk. Keep all the levels to zero from your dsp and than level match.
There is alot of misconception on playing tweets low down. Generalizing the criteria that a driver with a low fs means it should play low is not correct. The elate mid bass has a response till 30hz but that doesn't necessarily mean that you should play it that down low. The non linear distortion is the key here to evaluate the crossover point. Always keep the driver in between the linear and non linear distortion pass band, for the cohesiveness, the dispersion should be wide and it doesn't matter where its placed.
If it were a 2 way set than this statement would have been true that a tweeter should play down to kHz or kHz to restrict the 6.5" driver before beaming point. Whereas in a 3 way set, we have a dedicated mid range driver which is handling the middle pass band.
Now in a 3 way alignment, a mid bass driver should not play above 500hz and a tweeter should not play below kHz. The reason is fairly simple. The imaging and staging cues occur between 500hz and kHz and human hearing is also most sensitive to these frequencies. I will demonstrate this with an example. If mid bass driver plays higher than 500hz and tweeter is also playing below kHz with a mid range in its own pass band. Then the mid bass driver is also making a phantom center, mid range is also making a phantom center and so is the tweeter. So that means you have 3 pairs of drivers which are creating the center, and imaging and staging. the results is diffused center, smeared stage. You will run back to TA again and again to cure the stage shifts and smearing issues but it wont get right even with the Eq as well.
So i say, let all these frequencies be handled by mid range, you will get and accurate and solid sound stage without any smearing and diffusing center. And this is why the mid range driver is the most important part in a system.