Well, I am mostly thinking about situations where my opening range is very wide and my opponent's 3bet range is very wide as a result. If I open 40% on the button I need to defend a lot to prevent getting exploited by the wide 3bettor, and I think by having a very narrow 4betting range and wide calling range, I'm way too easy to play against.
I watched John A's video on 4bet bluffing
(I think it was one of his vids) , so right now I've been bluffing with lower suited Aces, Kings, and Queens with a value range of JJ+/AK. If they are bad/spew money postflop, I flat with more value hands.
My biggest problem is having a wide flatting range vs a wide 3bet. It's hard to play big pots with the marginal parts of my range. Mostly when I miss.. I have been doing a lot of work on this the past few days though, and I think I am playing better..
I've also been thinking about when to 5bet bluff and what to do it with. I have attempted it once and got stacked with KQ vs AQ. But I still think it will be useful in the preflop battles I'm anticipating with my new aggressive preflop strategies. I think suited Aces are going to be my go-to 5 bet bluff hand.. but I'm also considering small pairs.