Inundation

[Songen]

BGwiki, like all wikis, are compilations of user submitted information (and subject to easily becoming out-of-date.) It's not "12.8%" btw, it's a 12.8x multiplier, which would be "1280%". You also are adding in skillchain damage/bonus, which is not included in the dev post..

The way the dev post is worded, it implies that "a skillchain comprising all 15 weapon types will have a maximum bonus multiplier from Inundation of 12.8" and yes, a 15-step sc including every ws type would indeed have an unfloored multiplier of 1.2^14, or 12.83918465 according to my calculator. ^^;; The only issue I have with that is that, as far as I've ever seen or read, it's not actually possible to create a 15-step skillchain mechanics-wise. Given that, it's rather misleading to give us that number instead of the much more likely 1.2^5 / ~2.49x. (Messed up my math in the prior post. ^^;; A 6-step would be ^5 not ^6.) Even adding up the damage increases applied to each step don't get close to the 12.8, so further clarification would be needed in this case to prevent misinterpretation.

~I didn't write "x" instead of "%", i apologise for the confusion however that was my fault for not double checking my spelling, my spelling/grammar isn't always good so you'll find small mistakes here and there.
~Camate didn't exactly word it right, but not in the way you mean, they simply put each part of the sentence in the wrong spot.

Inundated by how Inundation works?

I’ve seen data based on player testing, and I can verify that the 1.2x increase per weapon type used in the skillchain is indeed accurate. Including pets, there are 15 total types of weapons, which means that the maximum value that can be reached with Inundation is a 12.8x increase.

allow me to realign it to make more sense:
~~Including pets, there are 15 total types of weapons,I’ve seen data based on player testing, and I can verify that the 1.2x increase per weapon type used in the skillchain is indeed accurate.which means that the maximum value that can be reached with Inundation is a 12.8x increase. ~~

if you look at it like this, you can see that the referal to 15 WS types isn't what makes the 12.8%. infact, camate specificlly says "1.2x increase per weapon type used in the skillchain" so that would take it far beyond the 15 weapon skills.

The "maximum value" which camate refers to is the maximum SC damage for that final SC set after performing 6 weapon skills and achieving 5 SCs, not the multiplier. every SC set prior to the final one is calculated at its own SC multiplier term and inundation multiplier term.

The result is similar to magic damage where you calculate magic attack bonus in one term, then calculate magic burst in another term. you don't multiply magic attack with magic burst, you multiply the damage

Magic attack (SC multiplier which comes from the current level of WS element such as light or double light and amount of WSs preformed prior to this point), magic burst (Inundation multiplier)

automaton for example have their own inundation multipler (For their weapon skills) in a different term to rdm's inundation which comes from their SC attachment called speed loader. in which case if automaton closes the final WS of a 6 weapon type SC, they push the damage further.
WS dmg x SC multiplier x inundation multiplier x automaton's inundation multiplier = final damage (without including all other special multipliers such as SC trait, SC gear, weather bonus, resists, etc)