In reply to glaramara:
> No, I'd be coming up the Diablo or the Kuffner so wouldn't be taking unjustified extra rope. The normal route worries me since missing a big serac fall by a day a few years ago.
I agree the normal route is dangerous, one of the more dangerous voie normalles in the Alps. But I think the faffing about to get to the Chere would be worse, in any case, the triangle du Tacul is quite some way below the summit and not that easy to locate from above. Then you have to find the top of the Chere, which, IIRC, does not start at the top of the triangle, but some way down.
So I think you are trapped into the normal route. One way to get it more stable is to arrive on the summit at quarter past midnight as I once did, it is cold, bleak and distinctly desolate. But it does have the virtue that you are not descending the main slope in the full afternoon sun.