For a start being +EV isn't an excuse to do something you want to find the most +EV thing to do.

And it isn't +EV you'll lose a tonne of money bluffing in spots like this at this level no matter how good you think your bluff is. Understanding balance and all that is very important but you just aren't understanding poker if you don't realise that someone calling far too much in a spot (like here) makes almost all your bluffs -EV.