Hockey is not a static sport, for all it can seem shackled to convention. The rigid hierarchy of forward lines with a clear division between top six and bottom six is gone.
There is no agreement, however, as to what has replaced it.
Use top-line, middle-six, bottom-line, if you **really** wanted to tier players in impact, since the middle lines are usually very similar.
— Garret Hohl (@GarretHohl) March 1, 2017
You might envision rolling four lines that you think of as equal in some way. And I might say that you’re a dreamer, but you’re not the only one.