I’d also say that I wouldn’t completely rely on your mastering tool to do the work for you. Your best tool in mixing and mastering are your ears. If it sounds right then it probably is right. The thing about mastering tools are they can be biased to low frequency information.
This is simply because low frequencies need more energy than other frequencies in the spectrum. This is because the wave forms cycle is much bigger. Where a typical high frequency would cycle several hundreds of times in a small room, a bass frequency wouldn’t even finish a third of its cycle.
This is generally why I’d ALWAYS opt to listen with my ears, rather than just rely on a plugin, as they don’t always do a good job of it… plus we learn more when we are trying to make the decisions.
You simply do this by dragging in a track in the same genre to reference. Solo that track every so often when mixing to see if you are going off on a tangent. This then resets your ears and gives you a firm reference point to mix from. After this, mastering becomes much easier.
Even if you used this technique and only used high end low pass filters to get the track into the right area it would still sound much better than a plugin could ever get you.