You don't.. have to, nor need to.
Yeah shure you could fudge ways around to do it. ie Call your 'master' a sub-master', feed
it to a new bus with the limiter on it (now the final output bus) and leave
that one's fader set to zero.
Now, instead... dun-ta-da-dom...
Get over having your master set any where but ZERO.
Master fader at zero, limiter's output goes to -.5 (or whatever you like for your 'safety zone).. and you'll never have to think of it again.
If your mix isn't hitting the master at that same ol' level use the
master input trim to compensate, not the fader.
Hey.. done that chase/compensate fader/limiter threshold mind numbing thing.
Now, pull fave comp/limiter up and always see/hear/get
consistent operation, feedback and response.
As a slight aside here. Quite often I'll have a string of mixes (multi song proj) and simply automate
the trim song to song and have much less need to ride threshold.
Very often simply drag the trim up or down into the comp to dial in the song's density and level.