Huge prussik fan. Picked up a tip from HamMike, if you put the prussiks on your tarp tie-outs you can adjust tension from inside/underneath your tarp. Also prefer my tarp under a full-length ridgeline and just 'biner my tarp to prussiks on the ridgeline and pull taught.
Has almost no hardware and I've used this in some treacherous conditions and it's worked flawlessly for me. YMMV
"I ain't here for a long time, I'm here for a good time"
- George Strait