@valjean9430: Sorry if I made it sound like that was the only optimal build. I just wanted to point out the hidden scaling to anyone who didn't already know. 8/7/13 is the point right before diminishing returns starts. After that is when you'll need to make give/take decisions, which you are never informed of. Even then, it's definitely more nuanced than, hidden scaling=bad.
In the end, the ideal I came to for myself is pictured above. And while I could be killed in a couple hits, the trade off was being able to drop turrets that melted everything literally every other second. If I had that build on my first couple of runs on the game, I would've died early on. It took knowing the game well enough to avoid most damage before that became a viable strategy for me.
At this point I would never go 8/7/13, but it took going that route first for me to finally survive long enough against HotK to learn how to not get hit.
And I couldn't agree more. Promenade, Prison Depths, Ossuary, Black Bridge is the way to go. After getting "acceptance" I don't ever want to see the Forgotten Sepulcher again. It's like "Drowning in Sonic 2: The Level".