There is nothing "beyond the 15 weapon skills." Inundation bonus only increases if the weapon type is different than any prior types that have been used in the same skillchain. As it appears to be a multiplicative term (in other words, starting with 1.0 for the first ws, multiply the previous result by 1.2 for each additional weapon type used in the skillchain,) you should be able to get the correct result with: 1.2^n, where n=(number of weapon types used in sc) -1.
So a 15-step using every type for the "maximum" bonus should be: 1.2^14 = ~12.83 (which matches what Camate stated, assuming there's flooring involved somewhere to account for the .03~ remainder.)
I am beyond confused as to what you are thinking is going on here. :/
The only thing that Camate addressed, and the only thing relevant in this thread, is the damage bonus multiplier provided directly by Inundation. Any/all other sources of skillchain or damage related bonuses are not included. This has absolutely zero relation to any other terms in damage formulas (like MAB) and zero relation to any of the damage formulas themselves.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)
I honestly do not know about the finer points on PUP, so I'll take your word on it being a separate term, but it's version (or any other interactions with any other effects) is not what matters here since we're talking about the RDM spell named "Inundation".
Inundation all by itself is what Camate replied about, and it doesn't really appear that the numbers given are absolutely "wrong", but I have issues with how the info was presented.. I believe what we've been given is rather misleading and slightly deceitful as it's basically impossible to make the 15-step skillchain that would be required in order to reach the 12.8x bonus stated. In that case, the stated "max value" stated should have been what a 6-step should receive, perhaps with a disclaimer that there is no hard cap on the bonus, instead of the over-inflated value stated that makes Inundation sound much more powerful than it is.
If I am mistaken and a 15-step skillchain is not prevented by basic combat mechanics, then I will stand corrected. ^^ Otherwise, my point stands and a dev post clarifying that the maximum effective bonus granted by Inundation is ~2.49x for a 6-step skillchain involving 6 of the 15 different weapon types along with official confirmation that the 15th type is indeed "pets".


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