about physical and magic pierce in calculation...

does the physical and magic pierce can go to negative amount when in calculating damage, for example using astute blade skill while i use armor with -5% physical pierce?

 

Yes, it increase the def/mdef of enemy. But depens for the quantity of enemy def/mdef. For example Zahhak Machina have 1000DEF in normal, so if you use -5% pp it will be 1050DEF.

 

owh, I'm kinda disappointed thou. i was thinking to make dte armor. but instead of using -matk%, I'll use -pp% so i can use it to my mage and halb char, while thinking that pierce thing maybe can't go below 0.

 

Is P/M pierce before or after Eternal Nightmare def debuff? How about Armor Break? How about armor break and Eternal Nightmare?

 

i guess flat amount reduce first, then percentage. like = reduce by 800 def, then pierce%. if there's armor break ailment, that would be Eternal debuff, then 50% from armor break, then pierce%