I have over 21,000 hr. total time of which about 15,000 would be on the long line.I have done all types of long line work with 500D,Astar,206 and 205 with steel cable with and without remote hooks (of all types) and kevlar lines with a remote hook and lengths between 50 and 250 ft.
As far as I am concerned the best system (I have found to date) is an Airborne Systems Talon remote hook with Emergco plasma lines with the electrical cord inside the line.I do not like having any sheathing or covering on the line anywhere as it is not necessary and only adds to drag at higher speeds bringing the line closer to the tail rotor.I am currently using lines with many thousand hours on them under very harsh conditions (dragging up through tree branches while shake blocking) and have not had one break.For slinging anything that has a tendancy to spin I always use a bearing swivel attached at the remote hook end.
Though I have done it with companies past that were only set up for it, working a line without a remote hook limits the type of slinging done as a receiver is always needed to unhook the load.
Should I find myself employed by a company that only provided me with a steel line and no remote hook, I would seriously consider early retirement or get a job elsewhere.
Happy longlining !!