Plane Sailing
Astral Admin - Mwahahaha!
Balanced around 1d8? Erm... you're off by a die-type there mate. Bow rangers are 1d10 as are broad sword wielders. And with a feat, both can up that to 1d12.
I disagree - standard for melee rangers is +3/1d8 so that is what it should be based around.
If melee rangers can use a feat to gain bastard sword for +3/1d10 then this variant could be allowed a feat for the same thing.
Allowing mega-weapons from adventurers vault into the game would then throw an additional spanner into the works (why does WotC do that?).
Anyway, my point is this - balance it around the base PHB class. Work out any add-ons depending upon what add-ons you use in the game after that.
Cheers