I actually carried a signpost up there during freeroam which I was then able to use during the fight, making it a lot easier. First you nail one of them by throwing the signpost and beat the **** out of him, which should leave him at about 50% health iirc. then you activate rampage, pick the signpost up again, and walk over to the same character again (who should just stand there blocking), using the melee hit of the signpost point blank which should lead to a grab animation of you ramming it into his skull, then you proceed to finish him off with the rampage. Now it's 2v1.
Should also work with the tires.
Last edited by Doopliss SWE; 01-13-2013 at 02:53 PM.