Before: All kinds of complex MasteringTool9001's
Now: A limiter
No but the problem for me with using a lot of plugins on the master is that I get so carried away with it that it usually sounds worse than the mix. It all depends on the track really, sometimes some multiband compression will do magic, sometimes it wont. Same goes with everything. But Yeah I still use EQ's to cut shit when I'm done with the track.
What I've noticed, for me, using multiple plugins or complex chains just tends to fuck my mixes up. I might change my mind and preferences as I do stuff. I dunno. Mastering is overrated imo.