To add another thing to the pile, I bought a pack of variety picks and found that certain ones do better with certain gauges / tensions. For about 10 bucks you could see if one material or thickness improves things.
I tried these 2 and landed on the JP Trinity. Other mentions were the JP primetone, EJ Jazz III, and hetfield black fang. Each had strengths for different guages and tunings
https://www.amazon.com/JIM-DUNLOP-Petrucci-Signature-Variety/dp/B0845Z7RZX?th=1
https://www.guitarcenter.com/Dunlop/PVP111-Pick-Artist-Variety-6-Pack-1500000010140.gc
I've tried some fan frets, some felt better, some felt worse. If you really wanted to go crazy you could go double drop d tuning on a 7 string. (just drop tune the lowest 2 strings). you could have your normal drop d and then more brootz
This guy I think plays very well and is 25.5" to 27" multiscale. If you can get in a store and try these it helps a ton. 7 strings may have a few more options if you're not finding it in 6 string baritones.
https://www.sweetwater.com/store/de...l-rgd71alms-7-string-black-aurora-burst-matte.
Edit: just saw your post on 7s, I think a 26.5-27 6 would be good too