So raising flop vs. c-bets isn't something I do very often and I'm trying to work it into my game more, but have been struggling to find good spots. Villain was 53/23 over 18 hands and c-bet 2/2. On the one hand I figured this as a good bluff as I have no SDV, double back doors and overs, and am OOP. I expect villain to fold here a lot given he's probably betting very often here. On the other hand, there's not a lot of value raises I can have here so if I'm bluffing here am I bluffing to often? Does it matter given villain probably won't adjust to that?

As an aside, on overall strategy would it make sense to be adopting a merged raising range here, and raising things like A4 for protection, 9x etc. as well given he's probably betting this flop quite often?