Horn 3-way Crossover Help JBL 2405h + DH1a

Hi everyone. I need a little help with a project I've been working on. It's a 3-way design and im trying to get the flattest filter possible and adding an L-Pad at the end. I have been experimenting with many different crossovers and slopes and havent seem to have gotten the right sound yet.

High-Frequency driver is a JBL 2405 8 ohm.

Mid-Frequency driver is an Electro-Voice DH1amt 16 ohm on a 1.4" Eminence horn.

Low-Frequency is a Dayton Audio RSS390HF-4

I know the low-frequency driver is not ideal, but Id still like to at least make something work and get a different driver in the future. I have taken a few measurements and will post them below.