I have been wondering good balanced c-r range for 3 suited boards. What hands should I consider raising bluff/semibluff?

for example but raises, BB call

flop Qd 7d 4d

but bets

I quess you should raise Ad-Jdx but do you c-r hands like 56 spades because it has so bad equity after all and if opponent calls you have to barrel also river because villain is only calling made hands or flush draw.

What do you c-r if the board is very dry like Kd 8d 3d?