nsw waratahs forwards coach simon cron says it would be stupid for his surging super rugby side to get cocky as they enter a huge season-defining run of tough games.cron described the tahs as a massive work in progress despite their recent hot form. in their past four matches, nsw have completed a sweep of their australian conference rivals to climb above early pacesetter melbourne rebels. their draw is about to get significantly harder.top tahs: michael hooper's nsw swept their australian rivals but the super rugby draw is about to get much tougher.photo: aaploadingon friday they host the lions, the south african conference leaders, who cron believes are even better this year after being losing finalists in the past two seasons. even if they clear that hurdle, nsw then face the daunting prospect of confronting new zealand sides in their next four games.`i think our conference at the moment there's obviously naturally an internal battle between all the australian teams,` cron said. `but on any given day each of those sides are really good so i think it would be stupid to be cocky.