Ok first of all i try this for the first time with such a hand, so i am sure there are some mistakes in it or it is total bullshit.
but maybe it will get correct with your help 
especially the second example is very hard to calculate because of a lot of variables.
so i tried to calculate the ev of the bluff if the turn doesnt comlete the flush and isnt a total blank, in case of a total blank or a 4/5 my ev even gets bigger.
1. ev 3bet flop
assumptions:
he never calls the 3 bet
defending range 55% , c/r at least 50%-> c/r range 0,5*0,55=27,5%
broke range: 33, AcTc, Ac9c, Ac8c, Ac7c, Ac6c, Ac5c, Ac4c, Ac3c, Ac2c, KJs, KcTc, QJs, QcTc, J8s+, ATo, KTo+, QJo, J8o+=12,25%
FE = 55,5%
Equity against broke range= 36,3%
Ev(3 bet/broke)=0,555*19,8+ 0,455*(-95+0,363*200)=10,89-10,192=0,698
But I think his broke range and his c/r range are bigger so the ev remains the same or even gets worse.
2. ev call flop shove blank turn
I don’t realy know what kind of turns I should use for the analyses.
So I try it with the Q.
I don’t consider a turn of c because I think that the ev is positive for this case.
Assumptions:
He barrels any turn
Same c/r range
Doesn’t call his draws he doesn’t get the odds with
Broke range Q turn:
33, AcTc, Ac9c, Ac3c, KJs, KcTc, QJs, QcTc, Q9s-Q8s, J9s+, KJo+, QJo, Q9o-Q8o, J9o+=10,11%
FE=63,3%
Euity against broke range: 17,8%
EV(call flop shove turn)=0,63* (19,8+20)+0,37(-95+0,178*200)=25,074-21,978=3,096
Conclusion:
Both bluffs are ok and against this opponent no big mistake
But i think the call flop shove turn alternative has the bigger ev because i didnt consider the case there the flush hits. Or the turn improves my hand
so feel free to destroy my calculations ♠_biggrin: