Ok so here it is in a simple easy to read fucking way not some chicken scratchings Good Will Hunting maths
player x deals 15k phy damage
Cp reduction
Elemental Defender or Hardy - eg 10% = 13.500
Iron Clad or Thick Skinned - eg 22% = 10.530
1st Damage shield eg 4k = 6530
2nd Blocking -50% = 3265
3rd S&b passives -20% = 2612
4th Defensive Posture -8% = 2404
5th Iron Skin Dk passice -10% = 2164
Resistance 660 = 1% reduction eg 33.500 cap - eg 10k pen =1394
Armor set procs - eg 30% pirate = 976
This is a simple fast way to look at it sure the person whos dealing 15k could be buffed and dealing debuffs but the results the same if hes dealing 15k its 15k your build then does that shit if your on a tank say in pvp