By Nathan Ridley Arsenal devastatingly hit Sheffield United for six in a Monday night mauling to keep pace at the top of the Premier League table. Mikel Arteta’s free-scoring Gunners struck three times in the opening 15 minutes, pummelling their opponents with another statement of title intent. Droves of home supporters trudged out of Bramall Lane and headed out before the Blades suffered further embarrassment, with Arsenal leading by five unanswered goals at the break. Ben White got in on the act with a left-footed strike to make it six before the only blot for the Gunners, as Gabriel Martine…