Bubba po
Tiny Stonehenge Moment
I have no idea what all that impolse stuff is but personally I use an overall reverb in an effort to create a 'space' that the entire 'band' is playing in and then simply put enough reverb send from each channel to make them all sound like they're in that space.
Using different reverbs on different tracks seems more like using 'verb as an effect rather than as a coherent space that everyone's in.
A reverb impulse is simply a reverb algorithm that is generated from an actual space, such as a church, subterranean cavern, stairwell etc. There are hundreds of these impulses available for free and they can sound really, really good.