[Catt]

Slowplaying should be very rare.

You might consider slowplaying when the pot is small, you have few opponents, all or most of those opponents will likely fold to a bet or a raise, and you have a very strong hand such that a free (or cheap) card might allow one or more opponents to draw to a stronger, but still second-best, hand.

In your case, you have a large pot, you have a bunch of opponents, you have no indication that your raise will drive anyone out, and the flop makes it relatively unlikely that others will get a turn card that makes a strong (but still second-best) hand. Don't slowplay this. Ever.