Perfect ethereal bugged archon plate with 4 x open sockets = 1179 defense.  The Fortitude made of it will be 3552 Defense. So we can know Fortitude eth ap with 3552 defense & 30 resists is the perfect one.

Perfect eth bugged sacred armor with 4 os = 1350 defense , perfect eth sa fortitude is 4065 defense & 30% resist one.

Perfect eth bugged Vortex is 505 Defense with 4OS, so perfect eth bugged vortex exile is 1818 defense ( 260%ED, 505 x 3.6 = 1818 ).

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