Hello Colin,

So far, assuming they are on the same baffle with no driver offset, I would go with a 2nd order butterworth crossover at 5500hz on the tweeter and a 3rd order butterworth at 3600hz on the mid. It will result in a mild .2 dB ripple at 3600khz and with a mild .4 dB trough, roughly 1 octave on either side of that point.

I would also recommend notching out the peak at 4000khz between the crossover and the tweeter.

"If you are flammable and have legs, you are never blocking a fire exit" -Mitch Hedberg