Things to consider:
1-RTAS is pretty much dead, so don't expect that to work at all.
2-As the others have said, I am also not aware of any drum VI that can host other plugins(but its a cool idea
).
3-most all of the drum VI's are capable of splitting out each drum sound to its own track(which is what you should do). You can send each sound to AUDIO tracks and print, or you can send each sound to AUX tracks. Either way allows you to treat the drums with your favorite plugins. I usually print to AUDIO tracks and then mix the same as I would for a real kit, with a few twists as follows:
A-I adjust the bleed for less snare in the overhead tracks
B-I skip the ambience and room mics and use my own effects
Doing this allows me to create drum mixes that sound great(to me
) and I avoid having my drums sound like the thousands of other users of the same drum VI
