How to Use the Power Plans?

I just got the K1 Tablet and was wondering, how do you guys use the different power plans (Max Performance, Optimised, Power Saver, Custom)? I haven't tried the Optimised setting yet but read that it's not so good for standby power consumption so what I'm doing now is, I would switch to Max Power just before playing a game and then after that, go back to Custom (with everything turned to minimum). It's a bit annoying though to do this every time. What would be fantastic is if this option was available in the quick settings shade.
What do you guys do?

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