Fastest 70-85?

Is this viable w/o a ranger? my two 80+ toons I'd group the lower with are a nec and mage. I get the feeling this is not the best option in terms of efficiency. Can anyone verify/debunk this assumption?

V/r
Xemitel

you will still get exp but not nearly as much as if you were using ranger headshot or rog/bezerker discing. Probably would not even be worth your time if you were not using the above 3 classes to pl with.