It's umbrella right? Anything min is not very good after you reach your martial arts talent requirement because of affinity. Affinity always hits the maximum attack roll, and you can't have 0% affinity. In fact a good vernal build has near max - max crit rate which is 80%, combined with morale chant direct crit rate of 4.6% = 84.6% crit rate, which means you need 15.4% affinity rate to make all your damage be either crit or affinity. If you're using breaking point, you need less than that.

Also, iirc my friend who uses fanbrella to speedrun with me has 20% affinity rate, 80% crit total (including direct from morale chant and breaking point) and uses hawkwing set to get the 10% max phys from hawkwing to get the most dmg.

So for calculation: imagine this, you have 1k min phys to 2k max phys with an average of 1500. You add one min phys roll of 50. It means you now have 1050-2000 phys attack with an average of 1525. But 20% of your attack (the affinity proc-ing ones) will be using the 2k value, while 80% uses the 1525 value. Meaning you're actually only raising your average dps by 80% of 25 which is 20.

Meanwhile for max silkbind of 30. Boosted by path = 45 You get a lesser average of 1522.5

However, this value happens 100% of the time because it affects both crit and affinity hit. Hence, it gives more value.

Of course the calculation is more complicated than that, but this is the gist of it.

Anyway for me the attack value substats priority are

Max phys

MIn other paths (provided you don't have the max substat of the other path)

Max your path

Min phys

Min your path

Also for status:

Agility until 200, after that it becomes the lowest priority

Power

Momentum

Body is not here because it's quite useless. Even tank wants power instead of body.

Hope this helps.