To be honest, I’m a total dummy on making retal build, so when making this my mind keep thinking of a “standard” of my usual build 
The reasoning behind it because it have flat aether retal and the belt have aether to acid conversion, so I guess it may add more acid retal as the build above can’t convert all physical to acid other than on the aegis, as the skill modifier fully convert the physical part to acid.
Well, it’s not really the goal of this build, would be amazing if it can even drop them to below 75% 
. It’s just the Amnesty set is one of the additions from the FG expac, it’s already old enough but doesn’t seems like there is much thread about it. The most recent and only thread that I can found that specifically use full 5p sets is this, and it didn’t seem that great compared to others retal build.