If you have trouble hearing or visualizing what's going on with your audio, Inspector presents a wealth of information in a tidy window that helps you understand the bigger picture. I use this plugin with everything I do, as a track insert and/or on the master bus. It wraps well with a DX wrapper, too.
The free download will also install demos of Elemental Audio's excellent and very professional Eqium and Firium plugins. You owe it to yourself to try them out. (Just know that, after you've read through the succinct and clearly written help files and played with them for a few hours, you probably won't be able to live without them.)
One discovery I made when using Inspector with Chainer is that, if you open a bunch of instances of Inspector (one to a slot), then solo one slot (which could be a not-used slot), the other Inspector instances will freeze so you can scrutinize the displays at that moment in time. This is incredibly helpful when trying to home in on troublesome areas.
The folks at Elemental Audio have been very responsive to my questions and suggestions. Top flight.