Do NOT buy Ni/Cr. It will never last.
If you do, make sure you buy the right
one (McMaster does NOT have it, MSC
does).

Instead, buy Kanthal. resistancewire.com
is a good source. There's something like $50 minimum, but it will last
you a lifetime.

When you wind it (lathe etc) make sure do it nice and slow, don't twist
it too much.

Any stress can be lethal to the spiral @ 1100C