Re: what weight spey line
Mike 1handers and 2handers have a totally different rod weight/line weight set of designations. You can take that one step further in that the 'spey line' you'd use for over head casting won't be the same (one step lighter if memory serves) than you'd use for water loaded anchor casting.
End game is take a look at the AFTMA line weight chart (grains) for a single hander and ditto for a two hander. 'Both' rods rated as a '5wt' for jollies. The two hander will be far heavier than the other. Its a rod construction thing.
When wealth is lost, nothing is lost; when health is lost, something is lost; when character is lost, all is lost. - Billy Graham"