first: add a FX track (FX Reverb Bus) and insert the reverb into this (this track will be routed to stereo out)
For source 1
add a FX track (FX source 1) and insert a delay (30ms) into this FX track (this FX track will be routed to “FX Reverb Bus”)
For source 2
add a FX track (FX source 2) and insert a delay (15ms) into this FX track (this FX track will be routed to “FX Reverb Bus”)
You can EQ this FX track the way you want.
But think about:
If you have a reverb with pre delay and EQ (like waves IR1), you coud create just one FX track for your source.
regards