In Q6 I'm assuming 100BB effective stacks.
You guys have generally posted that a small 3bet is better but thats going to leave a pot of roughly 20BB and both players having 80BB behind. Ok so he'll call the 3bet with everything, but you justify that sizing on the assumption he's a maniac who will stack for 4x the pot on the flop with tpwk. If the assumption is that he's this bad, then I prefer making it 18x pre, as it's not going to take that much out of his range, and stacking him on the flop if he calls and hits is said and done - then there's the idea he'll tiltbluff shove utg a lot.