Ok lets play this "metrics criteria" another way. Firstly I haven't sat down with a calculator to work out any figures so just run with the idea and if anyone with time and a calculator wants to work the following out then great.
Lets say that Victory and City attract 2% (it might be 4% or 9%) of the Melbourne and Sydney population to their home games which produces their average crowds. Then depending on what those two cities percentages are to produce their average then what would be the crowd size for the Phoenix based on that same percentage of population of Wellington as to Melbourne and Sydney ?
If its metrics we have to play at then two can play that game.