In reply to ben b:
Gosh! Before those last few posts about French Ridge, I was going to say: but it is actually a (well-used) track! Steep I agree. You should try some of the other "tracks" around. Mt Adams on the W Coast for example. Good bit of tree tunneling to be had. But really nice peak once you're up there. Guess it depends what sort of apprenticeship you've had...
However, with an overnight pack, French Ridge is a really good way to get fit. Only prob is that as a solo person you prob wouldn't get to the "top" of something, as there are/were a few slots around above the hut.
But Malte Brun is the final target? Great choice, as it has some of the best rock -- for a mountain -- in kiwiland. You still have a little bit of rubbish to get up to the good part of the ridge. Awesome views from the top. Access to Beetham Valley from the moraine deteriorated (more) in last 15 years and you have to be careful in there.
And in that case, Ball Pass is poss worth thinking about, as a prerun, because you can see your main route and the access [
] from there. The Hooker side of Ball Pass is easier/safer than the Tasman. But these kinds of things are serious alpine "tramps", so if by self and first time in that sort of terrain...perhaps not. A good track like Mueller Hut is a safe-ish bet.
But above all else, I think the weather will be the biggest challenge. But if it is kind....