After Australia secured their latest series win on Tuesday, Alyssa Healy indicated the world champions would not rest in pursuit of achieving higher standards with next year’s World Twenty20 looming large. That left open the somewhat obvious question: how can a team apparently at the pinnacle of their game possibly improve any further? Healy herself delivered a devastating answer 24 hours later when she entered the record books with a brutal 148 not out – the highest score by a woman in T20Is – to power Australia to a comprehensive 132-run victory and a clean sweep of the three-match series against Sri Lanka. The wicketkeeper-batter was unstoppable at a sunny North Sydney Oval on Wednesday afternoon as she launched her personal assault on the Sri Lankan bowling attack, reaching a half century off 25 balls and 100 off just 46. In her 101st T20I, it was her maiden century and the fastest ever by an Australian man or woman – Aaron Finch held the previous record (47 balls) with Meg Lanning next on the list (53). The milestone was brought up with a sweetly-struck straight six – one of seven throughout her innings – as Healy passed the previous benchmark…