Well, sadly, SE didn't design the game to allow for this in any reasonable fashion low-man. It's 6 man or go home unless you do some kind of gimmicky junk that some players will call for nerfs on, OR, SE themselves will think it is too powerful and nerf it (kinda like the BST pet command range nerf that I've read about).
I've always been of the opinion that as newer content is released, older content should be adjusted to make low-man, or even solo, possible. Because why not? It's obsolete. No harm in letting people low-man it.