Do any of the performance OEMs on the ppcgeeks kitchen really work?

[sandiegodude]

Just tried the ppcgeeks kitchen for the first time.
WOW was I impressed with all the oems and options available for customization. (great work guys)
My question is in regards to the performance, glyph, overclocking, and battery tweaks oems.

Do they really work?
Do they cancel each other out?
HTC performance gives the option to OC (although the true effects are debatable)
And there's another oem to help conserve battery.

Has anyone tried different combinations and benchmarked their ppc in an attempt to find the fastest possible "formula" wthout sacrificing too much batt life or ram?

I would love to know the magic potion. That would make a great base to work with.