I have been heavily routing vengeance and so far I've brought time down to 8:53 with a death at the sniper area the best thing ive found is you need to be level 20, you need the upgraded enhanced remote hijack to take out the ASP really fast, extended camo for the stealth sections, overkill perk so u can have a AR or smg, a drakon with a thermal scope, extended mag, and FMJ to kill the robots and snipers fast, upgraded traversak enhancement and copycat tac-rig.