So you're saying instead of the A332, get an A342?
Well, in AWS it is a bit different to real world. Here the A342 is the same size as the A330-300, which makes it truly better than in real world. A route that fills an A332 will fill an A342 or 343 as well.
The problem is: For only 40 PAX more Maximum capacity, the A342 sucks 800kg more fuel per hour. If we look at an A343 (and since you are in MT I suggest the -300E variant) we can get 60 PAX more capacity for only 5-600Kg more fuel usage. So, if you have enough demand for about 30 seats more (in 3-class configs) you should consider the A340-300E.
To make it easier for you:
On a 6500NM route with a demand of roughly 300 the choices are:
(* denotes aircraft I haven't yet personally used thus am not sure about their actual workout, but base my judgment on theoretical values)
hope that helps