Creativity, delivery and finishing.
In Grant, Celtic have arguably secured the best set-piece coach in the Premiership last season, so that is one box ticked.
In Arne Engels, they also have someone capable of executing a deadly set-play.
The Belgium midfielder took the third-most successful corners in the league last term. He also ranked in the Premiership's top 10 for set-play chance creation.
Only Rangers' Emmanuel Fernandez and Hearts defender Findlay scored more goals from corners than Celtic's Benjamin Nygren, while Daizen Maeda sits in the division's top five for headed shots.
Celtic, therefore, have players capable of getting on the end of deliveries.
However, with Engels and Maeda linked with summer moves away, they could be looking for replacements for two players who have contributed significantly to both their open-play and dead-ball output.
As fans grow tetchy about a lack of summer activity, there will also be intrigue over how much focus on getting the best out of Grant's skills will influence player recruitment.