[sahaguje]

you definitely have to raise that flop. Middle cards rainbow is perfect for you : there is little chance you are beaten by a huge draw, but a lot of players will (incorrectly) call you with 2 pairs and straight draws. Almost always raise that flop in a multiway pot, maybe varying a little the size of your raise from 2/3 to full pot.
And of course insta call on turn. Have you calculated the odds here ? 57 to win 240 !!! Even if only your 8 nut outs are good you have a clear call.