I just finished installing the Pro Truck Stage 2 system on my 2018 TRDORP. I went with heavier springs on the rear when I bought this kit. I have a low profile bumper similar to C4 built by Artec, and a Harbor Freight winch, and I got 1" of lift on the front and 1-1'2" on the back (I had leveled my stock front before this, so those numbers started out with a level stance) right out of the box. I'm not set up on the highest for the front, I have room, but I am allowing a little rake so that when I load up it levels out. Plus, honestly, it looks good with a little lift and still raked.
Does anything I'm typing equate or help? I don't know... but I think the best answer is to reach out to Eibach. They take customer service pretty seriously, and when I thought I'd only get an email back, they actually called me to talk it through. My setup is similar to yours, but I do have different components.