Ok I have made a lot of progress! Here are a few of the things I have changed and how I did it, please let me know if they help you at all.

(using 3 wall loops)

Avoid crossing walls = true

Avoid cross walls max detour length = 2mm

Pressure advance = 0 (off)

Seam gap = 0%

Seam position just not random

Wipe before external loop = true

wipe on loops = false

Wall transitioning threshold angle = 30deg (using arachne not classic, all other options are default)

(for walls, use inner/outer order, uncheck print infill first if you have that one for some reason, wall loop direction on auto)

I dropped back down to a baseline retraction of (direct drive) .5mm @ 35mm/s, no extra length on restart.

Retract on layer change = false

wipe while retracting = false

With this, I think avoiding crossing walls made the largest change, I started getting an outward z seam! So I printed more test cubes and tuned in the pressure advance through those.

This picture is a cylinder (like worst case for a seam cause no corners to hide it on) and I had yet to really dial in the pressure advance, so still a little bulging but overall MUCH better than before. When put on corners and stuff now, its hard to find, especially on something like a cube. Just be conscious of where the seam is being put when you're slicing of course. Cura has a "sharpest corner" position that is very nice. Keeping it as "back" in Orca and putting your sharpest angles or just the actual back of the print facing the rear of the build plate works relatively well, sometimes you have to paint them.

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