A superb all-round performance propelled Pakistan to a second successive ODI series victory in South Africa after a comprehensive 81-run victory over the Proteas at Newlands on Thursday night.The visitors set the Proteas a record 330-run target, which proved to be comfortably enough, despite Heinrich Klaasen once again fighting a lone battle for the hosts.Shaheen Shah Afridi was spectacular with the old ball for Pakistan as the left-arm seamer managed to gain excessive reverse-swing at high speed to finish with superb figures of 4/47.Klaasen followed his 86 two days ago at Boland Park with…