Boss Damage Vs. Ignore Defense Rate.

I believe those formulas are equivalent.

edit: was doing other stuff, but I'm guessing PDR is the monster's def in your formula?

Anyways multiplying all the ignore% together doesn't exactly work. If you multiply 2 50% defense ignore together, 50% x 50% = 25%. That's like saying the more defense ignore lines you have the less defense you ignore.

I think you mean DEF - DEF * DEFIGNORE1 * [( 1 - DEFIGNORE1 ) * DEFIGNORE2 ] X {[ 1 - ( 1 - DEFIGNORE1 ) X DEFIGNORE2 ] * DEFIGNORE3 } * ...
which would be equivalent to DEF * ( 1 - DEFIGNORE1 )( 1 - DEFIGNORE2 )( 1 - DEFIGNORE3 )...

Yeah that's what I meant, Thinking it in my head then typing it got my formula messed up.
With that being said, It doesn't seem like too much of an issue to get a decent amount of PDR, going off of CPB as a standard I think I've got enough PDR already to not have a huge decline in damage and as a result I know it's going to be better for me to focus on accumulating boss damage. Thank you all for your input to this question/discussion.