yah i've had them on together for a few months. before that had the hotchkis coils on by themselves. only springs that wont be too low for any strut will be TRD
or eibach prokits. kyb and koni dont recommend anything over about an inch and a half drop. hotchkis rears are 1.7 as long as your not packing a car load of passengers everyday, you'll be fine.
only reason i upgraded struts in the first place was because i bent one of my struts in an accident and the only reason im lookin to get rid of these is coz i wanna take someone elses setup.