So I finally got around to playing with some tips after burning in the IEMs I bought, and here are my preferred configurations:
**** 4in1: Spiral Dot, size ML (though I think the L would fit me better)
The Spiral Dots help bring the V-shaped nature down to something closer to Flat, but the mids are still recessed ever so slightly. It still tamed the treble, but made the bass a bit weaker than I like. Nevertheless, it's my preferred tip compared to the stock narrowbore or stock widebore.
LZ-A2S: Comply T-200, installed reverse
Both the T-200 and the T-400 fit, you can think of them as narrow and widebore versions. As the A2S suffers from clarity issues where the mids bleed into the highs (i.e. the lack of separation for in instruments and some pop tracks with synth where things in the upper mid to lower treble range get muddled together), I didn't want to flatten the wings by using the Spiral Dots. After using Spiral Dots, I switched to the comply's which boosted the bass more so than the treble. As the treble was already less harsh than the 4in1, the resulting combination worked well.
If I had to pick one as a DD IEM, I would pick neither. They both have two giant flaws for my personal preferences.
I use deep insertion on all my IEMs.
**** 4in1: These housings aren't designed well for deep insertion. They cause pain after a relatively short amount of time. I do enjoy listening with them on a short period basis. Now I just need to see if the Spiral Dot L fits better than the Spiral Dot ML.
LZ-A2S: The mid-treble bleed takes away from the listening enjoyment.
Havi B3 Pro 1 will be coming soon, so hopefully that will test better for my preferences.
I do have a monitoring IEM in my DBA-02 MkII. After burn-in, they sound just as flat as they did before, and for monitoring and critical listening purposes, I'm happy with them.