hehehehe..... i can write too much too ;)
that very team actually got over 200 wins in emerald (with brick break > outrage), and variants have gone over 100 in diamond and pearl. so i think it will work - its just a matter of getting no hax for long enough. it pretty much resists all but a very special kind of hax (OHKO) extremely well, so its just a bit of a random luck thing.
i blasted through 49 with pretty much starmie alone (backed up by salamence+blissey), and am now again over 70. for this run ive switched milotic for a flawless SS suicune, which is what i used to use. it takes chesto berry, so blissey can have leftovers. i told myself i'd switch back and forth until one of my teams cracks it :)
and yeah, australians are the best at the battle castle!! although i dont think my record has been updated still.......