"Unused" Ancients

I have a spreadsheet I've been using for leveling my ancients and, for the sake of completeness, I have formulas for all of them. But I've noticed recently that none of the published tools in the "Calculators & Tools " box do that; in fact, most of them ignore some ancients completely. Even the azurewebsites calculator, which seems to be the most complete, doesn't have recommendations for many of them (specifically, Berserker, Chawedo, Energon, Hecatoncheir, Kleptos, Revolc, Sniperino, and Vaagur) -- at least, not at my current level.

Why is that? Is it because they aren't worth leveling, or because they depend too much on one's playstyle, or what? What's the consensus on these previously capped ancients? Clearly, I've been wasting souls by leveling them with my spreadsheet, and it would be nice to know just how many.

BTW, please don't ask for my spreadsheet. First, I don't think it's any better than what's already out there (see above), and second, it's written for Libre Office Calc, which may or may not be compatible with what you have. So, don't ask. Just ... No. It wouldn't be of any use to you.