Re: area constraints

thanks all for clearing my doubt.. 
in fact my design is consuming 99% slices (69% FFs and 67%LUT ) (is
this figure/ratio normal ?)
.. in xc2v3k it's having 5-6 heirarchy levels .. and i am in dilemma
how to go about
floorplanning this design .. i don't know if i shud make rpms of each
module from the bottom ?
make everything rpm or keep some modules as rpm and make area groups
for higher levels ?
experimenting all things cud take a long time .. that's why a want to
have some advice
from the expert .. 
in one line what is the general procedure to extract the best
performance(important)
as well as runtime from the tool in case of high density designs ?

regards
ay