First thing is to get the snare nice an tightly gated, but natural sounding. Here are the settings I used:
The snare should sound nice and isolated from the hihat like this:
With this sort of isolation, you can now eq, compress, process the snare to your heart’s content without messing up the cymbals. It’s a nice sounding snare, so even if you do augment it with another sample, it’s worth keeping in the mix IMO.
You might be able to use similar gate settings to isolate the toms, although if they are only hit occasionally, I would suggest just splitting out the individual hits to other tracks - that way you can tailor the sustain using fades etc.
Now, to the hihat: I went through and created a hihat track by duplicating the snare/hihat track, but I split out the snare beats, and replacing each snare hit with another “strong” hihat hit from the sequence. This way, your hihat sound can be eq’d independently of the snare… as I said, it’s a bit of work…
Here is what that looked like in Reaper:
…& here is the “fixed” hihat solo’d:
…now with an EQ low cut and a high boost:
… & the whole shebang together with the kick (and a little bit of panning on the hihat):
Hope that explains it - any questions, hit me up!