eh, i wouldn't be afraid of the flush much.
he's only got the draw sometimes, and even when he does he's only gonna make it on the turn 20% of the time. in the meantime, he could make top pair on the turn for you to bust him for everything. you're not gonna flop a set too many more times in this tournament, i'd guess
3 handed when you're big stack is a fine time to slowplay.