loosening ram timings

[runLoganrun]

Stock is 2-2-2-5 (samsung tccd). I can get a lot higher at 2.5-3-3-7. What about in between though, to get it as efficient as possible, and not max out the ram. What numbers do I change first? eg: 2.5-2-2-6, 2-3-3-5, etc.

With the same cpu clock number in mind, do I want to a) max out the HTT and ram speed (using 1:1) and have a lower cpu multiplier, or b) keep tighter ram timings and lower the HTT and ram speed while using a higher cpu multiplier? What's the difference?

Thanks in advance