I'm using TC pack and i think it's not a problem to chain anything to anything.. sidechain compression is a need for pro sound,,as DB said above,. i agree with it,,you can make overall sound much better,or totaly **** it up.. it just depends, how good you're in tweedling with ratio and threshold :)))

sidechain bass to kick,is a need, ithink,it's also nice to sidechain group (bass+kick) to some perc or hihat loop. chaining some grooves with kick or some another rhythm part can make that typical wooshy waashy techno sound.. someone called it wooshy waashy in some similar topic,. :))
. there's much more you can do with sidechain.. just experiment!