Using LLC at least on ASUS C6H is definitely not required or recommended.
Even at "Auto" setting there is no droop what so ever, no matter how hard you push the CPU. Infact generally the actual voltage output is 10-20mV (depending on the specimen) higher than the actual set point. Voltage overshoot hurts just as badly as undershoot (droop). The whole point is to minimize the variation between the different load conditions. If you need to increase the LLC to achieve stability, then your voltage set point is incorrect (insufficient) to begin with.