I'd like the turn raise bluff much better if it was a 6,8,9,T,J (assuming you didn't have AJ, like this hand). At least you're repping some more realistic hands that would flat flop and raise turn. That's still around 36% of the turn cards that we can raise and rep something on this type of board. I just don't like this particular turn card.

The problem is that you might flat a boat twice pretty often in this spot. You might raise 7x a reasonable amount of the time on the flop to balance with air. So the times you decide to flat 7x on the flop AND raise the turn with 7x (instead of flatting again), seems verry small to me in terms of a credible range.