I've used the damage formulas from Global SoulArchive and the boss defense values at end of this section from "EXA|Stinction#9845" on discord (THANKS A LOT)
Here are my calculation steps:
While calculating AB damage dealt values i use "BD start" as a fixed
value and change AB starting from "AB start" with increments of "AB step
value" until i reach total of values provided in "number of steps".
Then when calculating BD damage dealt i use "AB start" as a fixed value
and change BD starting from "BD start" with increments of "BD step
value" until i reach total of values provided in "number of steps".