...
duct tape
para-cord
large eye needles
assorted safty pins
...
That's a great list. I'd add a couple of zip ties. With those items and a SAK/multi-tool there's not many gear repair/improvisation jobs you cant handle.
What about adding dry wall screws? With the bits from my multitool and a bunch of them, I think I could create some make shift repairs in a hurry, that could hold for a while.