For all occasions really...
I've used em all....
Korda Carpline, Korda Contour, Gardner GTHD, Wychwood DPF, Dawai Sensor Clear, ESP Synchro, Fox Soft Steel, Sonik Subsonik.
All performed well,...Korda Carpline is to me an all-rounder, Contour sank like a brick but was too thick, GTHD was 1 of the better ones, DPF was a bit wirey, Sensor was joint with GTHD, Synchro was wirey, Fox Steel 2nd, Sonik the diameter was too thin so need to up the break strain....
Daiwa Sensor Clear 15lb or Sonik Subsonik Clear 18lb