First thing in case there is misunderstanding. 1.2x is 120% increase, 2.4x is 240%increase, 3.6x is 360% increase
In the sense that camate could have been explained more clearly, yes, it woulda helped alot, however what your doing is nit picking specifics which have already been researched by players and confirmed by SE themselves.
Below are links to some the forums (I hate researching again things i researched a long time ago and seen first hand)with some pic's of weapon skills and SCs (So you can see for yourself) of the ENGLISH research which if you pay attention and actually read the chat with the pic's and what level the skillchain is at and do the numbers how i have explained before (Dmg + SC multiplier+inundation multiplier) you get the result with some variable's which is normal due to resists,weather,gear, monster level penalty's, etc), (This excludes the japanese research however reflects some japanese research since i found some info during my research today which matchs the english research)
Beware this is only 2 links out of a much larger research section done by players, don't think this amounts to everything everyone knows
http://www.ffxiah.com/forum/topic/46...spell/#3042612
http://www.ffxiah.com/forum/topic/38...ng/85/#3072974
Looking at those pics, doing the math, doing the calculation, you will see the 12.8x mentioned by camate IS the final SC damage resulting from a full set of inundation and SCs
SE has made mistakes on how they have worded things, and on multiple locations i saw themselves correct themselves which is how they worded it only, very few are direct calculation mistakes, and while it can be confusing sometimes.
The main thing to keep in mind is: they confirmed the player data resulting from hours of player researching and calculating data from different sources and different means, even small bits like those 2 pic's along offer so much information.