Only prob with this mate is the range issue, dont think a 764ER will reach the 5400nm+ destinations in this config. Im leaning more to the Bus at the moment, or maybe i could run both types.
An A333 isn't going to be reaching 5400NM+ destinations with 300+ seats in it either. Max range variant is 5460 with standard config (280 seats). If you stick 345 pax on board you're going to be back somewhere around 5000NM or less I think, based on the difficult to read range graph.
While the A332 can go further, in terms of fuel consumption it's much closer to the 763ER than the A333 and 764ER on a fuel per pax basis. (note: I'm figuring that based on max pax capacity since aircraft can be configured in a variety of ways.) It's still better, but the advantage is not anywhere near in the same league as the A333 and B764ER's advantage over the A332.