The Hurricanes, fourth, host the Blues next but will face a concerted challenge for their right to hold a home quarter-final in their final round-robin match against the Chiefs, who are currently fifth.
The Highlanders are sixth.
It is looking increasingly likely that the title is the Crusaders' to lose. They are unbeaten in six matches at home this year and while they lost away to the Hurricanes and Highlanders on successive weekends in March, they haven't lost since; a run of 10 victories.
Last year they finished second on the table behind the Lions, who didn't play a New Zealand opponent due to a significant quirk of the draw. They beat the Highlanders and Chiefs in Christchurch in their respective quarter-final and semifinal matches before travelling to Johannesburg and winning at Ellis Park, an historic achievement.
They have few injury concerns, with No8 Kieran Read now back in the mix and likely to play 40 minutes against the Highlanders on Friday, and in lock Scott Barrett, first-five Richie Mo'unga and centre Jack Goodhue they have three players who will be enhanced by their recent All Black experience.
Barrett was arguably the All Black of the French series, with Mo'unga and Goodhue making their test debuts in Dunedin, the latter playing 80 minutes and looking increasingly assured.
Coach Robertson has the Crusaders playing an adaptable style – they are equally comfortable with a wide game or a territory-based set-piece focused strategy – but are near unbeatable at home at this time of year with conditions favouring a side who can flourish despite a slippery ball.
They have one of the best scrums in the competition and their lineout maul is second to none. They have finals pedigree. It's difficult to imagine any other team lifting the trophy in 2018.