FG-X.
I only aim for 10 dB RMS and turning the limiter on / off with volume compensation, I honestly cannot hear a difference, and 10 dB RMS is plenty loud. Since getting VBC, the drums hit it punchy as fck so I don't need to play around with any of the transient stuff.
I think going for 8 dB and 6 dB RMS is a Rick Rubin level of silly, and that's where people run into trouble with trying to find the holy grain of limiters - they're just squashing everything too hard yet expect a result as clean and punchy as the initial mix down.
I can't wait for AirEQ to finally drop as I have high hopes for that to be the final link in my mastering chain.