sorry, but what in the world are you talking about? The accuracy of the AGT and Obelisk is already spot on, AOE makes no diffrence when trying to sneak. Unless you're trying to sneak in with 2 people, but even then, common sense would tingle and make you not go at the same time at dangerous spots. this is just simple practice.
And have you even tried running to the Obelisk in field? The edge of the Refinery no longer gives cover against the obelisk, and running from the wall still doesn't work because the blind spot on the obelisk has been reduced.
I see what you're trying to say, but it makes absolutely no sense here.
He is right. If you sprint towards the obesik, it will only be able to hit you once, therefore you can reach it with a 1k infantery as he said. Still not a good plan since any mine or turret or other player will easily kill you with 50 hp left.