How Weapon Damage Works in Warriors Orochi 4

So I have been seeing some talks about being able to get a 3* weapon with higher attack than Unique weapons. This is true, but I don't see any explanation of how the weapon damage in WO4 works, so I decided to share it here.

Unlike the previous game weapons that aren't Unique do not have a fixed attack value.

The attack value that is displayed without taking into account compatibility consists of two parts: the base attack value, and a random 1-16 supplemental atttack value.

Base attack value is randomly chosen from a static range while the supplemental attack value is dependent on the difficulty of the stage.

The game does not differentiate between the two so there's no way to tell how high the base attack value is and how high the supplemental attack value is.

Attached here is a spreadsheet with all the ranges of base attack value for different characters' weapons with the number in parentheses being the maximum possible displayed attack when accounting for supplemental attack value.

At max compatibility 2* weapons gain a bonus of +9, 3* weapons gain a bonus of +13, and Unique weapons gain a bonus of +19.

This will allow us to determine which characters have the possibility of acquiring 3* weapons better than Uniques.

However, it is to be noted that getting a minmaxed 3* weapon requires an insane amount of RNG. I've read reports of people saying they couldn't get minmaxed 3* even after grinding Chaos mode 200+ times. The official guide book stated that to get a higher chance of higher supplemental attack value, you should play at higher difficulty. As a result, the best chance of getting a minmaxed 3* is possibility playing the last stage on Pandemonium mode, and even then there's a lot of RNG involved.