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A full Black loop nets 375 KC, roughly 2000 Lightbulbs, or... ah yes, 20 Emetic Revelations (I thought it was only 2, unfarely), approximately 41.67 KL/Action, better than the Stacks' 23 KL/Action, and by far superior to the Symposium on a good day indeed. Let's see:

<img src="/w/index.php?title=Special:MathShowImage&hash=8194a760aaf3d79b6717c2fac9338f55&mode=mathml" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -2.671ex; height: 6.509ex; width: 124.965ex;" alt="{\displaystyle {16/3*((16.5|14|12.5)*6+12.5*4+415*0.03+2.5*5+2.54*5+(82.5|70|62.5))+(16.5|14|12.5)*6+12.5*2+2.5*4} \over {12*20+375/45+20}}"/>

<img src="/w/index.php?title=Special:MathShowImage&hash=5f5a598309cd9c5bdb11ec6695091817&mode=mathml" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; height: 2.843ex; width: 16.15ex;" alt="{\displaystyle =5.85|5.25|4.88}"/>

Brilliant!

But, ah! Perhaps, let us not bother the Engineer with our little Rat-Market exploits. After all, if we utilize a lower EPA through the Rat-Market, the overall value decreases, and if we use a better EPA grind for sourcing... why not sell the sourced items for a better EPA?