Will you be climbing as a pair, or three people?
If three, and there is technical climbing (i.e. pitching), then 2 times half-ropes would be my vote. If three and only glacier travel - one half rope.
If two? I'd probably still prefer two half-ropes - if your objectives change, you can leave one half rope in the hut and still have a lightweight rig for glacier travel, short raps. The 6mm rap line seems very specific if general mountaineering is the aim.
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