Blast ignoring PDRate?

All attacks ignore PDD is one of my assumptions --- maybe this property is forgotten ,and instead by PDrate.
But that case can't explain all the damage ranges.

Bossing armour Buff will show on the table, from a video that I've seen these days.
Which distracted me most is : Adv dark aura ,and watt without buffs.
Asuume that dark aura increase att by 21% ,
It is easy to calculated that watt without bossing armour is (238 / 1.21 - 34 )*1.21 = 197
Then base damage come to 9140 ~ 9723.
SO ACB damage range is (9140 ~ 9723) * (130% * 1.5 + 12.5% * 1) * 480% * 0.9 = 81930 ~ 87156
a bit more than 81523 ~ 86646 from video, isn't it?

by the way, 196 watt fits ACB and Rush damage range , but blast doesn't ......

"ignoreMobpdpR" works on each hit, or min damage can't close to 94% of max perfectly.
Is it additive 90% + 7% = 97% ? or multiplicative 90% + 7% * 10% = 90.7% ?

Doesn't Adv. Dark Aura add 31% (20% from Adv. and 11% from basic)?

Also, why would all attacks ignore PDDamage? Wouldn't it then be totally useless to have it added?

That means his attack would be without bossing armor: ROUNDDOWN(238/1,31-34)*1,31 = 192
Then base damage would be 8908 ~ 9467.

His ACB damage would be (8908 ~ 9467) * (130% * 1.5 + 12.5% * 1) * 480% * 0.9 = 79851 ~ 84862, which is actually less then his DmgRange in game. Does he even have max Adv. Dark Aura, not like level 15 Adv. Dark Aura or even just normal Dark Aura? T.T

That renders the complete next part useless (I wrote that before this)...

And I don't think minDmg will match 94% of maxDmg of Blast, I am for some reason still thinking that blast completely ignores one of the defences with a set rate.

BlastMin = (8908*226%*(130% * 1.5 + 12.5% * 1)-850*0,55)*90% = 37176, which matches 38977.
BlastMax (if it completely ignores PDD) = (9467*226%*(130% * 1,5 + 12,5% * 1))*90% = 39956, which doesn't fit the 41234 max hit.
BlastMax (if it completely ignores PDRate) = (9467*226%*(130% * 1,5 + 12,5% * 1)-850*0,55) = 43928, which fits the max hit.
BlastMax (if it ingores 7% of PDRate, v1) = (9467*226%*(130% * 1,5 + 12,5% * 1)-850*0,55)*(90%*93%) = 36768, which doesn't fit at all.
BlastMax (if it ignores 7% of PDRate, v2, additive) = (9467*226%*(130% * 1,5 + 12,5% * 1)-850*0,55)*(97%) = 42610, which could fit. There's just one problem here... what if you get 11%+ IgnoreMobpdpR?
BlastMax (if it ignores 7% of PDRate, v3, multiplicative) = 9467*226%*(130% * 1,5 + 12,5% * 1)-850*0,55)*(90,7%) = 39842, which doesn't fit at all.

I only see two options for ignoreMobpdpR, of which one seems really unreasonable.