There is absolutely no difference between mono and shockleader so dont get confused its all line at the end of the day. The only difference is that some lines are better than others, ie stronger, thinner more abrasion resistant or less stretchy. So some are better suited to leaders than others
Save yourself loads of hassle!
Buy a spool of 80lb clear Ultima Powerflex for rig bodies (0.8mm)
70lb clear or orange ultima Powerflex for shockleader(0.75mm)
These lines are tried and tested and probably the most reliable on the market. The 70lb is widely used on the tournament casting field and is very very strong and reliable
You can pick up 4oz spools (200yds + per spool) for around £7-8.
Rutherfords own brand shockleader is also very good, I actually think its Ultima but only Andy R could answer that!!
Ive tried his orange shocker in 60lb and it mics out at 0.75mm so think its probably 70lb ultima in disguise!