You can supercharge an agressive AP the trick to getting any super big weapon is snowballing. The advantage to playing conservative is you have less risk but you snowball slowly. The advantage to being agressive is you have a higher risk of having to start over but you have a chance at snowballing very rapidly before people realize that yesterday you had 20 charges and today you have 80.
I would say that we have only seen 3 succesful "aggresive" AP's though, Kharglum (played by twist and emperor at level 35ish), Cabdru (played by nep using a lot of obscure gear to hold onto power after he snowballed), and Fjodir(WHo had castable barrier) so while I would love to argue that agressive works (and it can) in practice it doesn't really.