For mastering, Alesso advocates tweaking the individual channels to be more beneficial in the end. Regarding the master bus, "I love the Sonnox Limiter and the Waves stuff for the master if I use anything."
At 6:25 of this interview with Chase & Status on SB-TV, the Oxford Limiter can be seen on their screen. "We use the Oxford Limiter. This is like for normal limiting, we put this on the master fader to kind of get the track louder".