I still think the importance of the number on their back is overstated.
At 6 or 7, Luai offers a direct attacking approach- a player able to take the line as easily as find gaps for support players.
He is second fiddle to Cleary. Much in the way Kieran Foran was second fiddle to DCE.
I don't think he will morph into a Cleary clone out of necessity. He will be Jarome Luai, in Tigers colours.
The important thing is to match him up with someone more attuned to directed the team around in a Cleary/DCE-style.
Next season, that player is Sezar. Sullivan is more like Luai as a player & will probably play a similar role.
Galvin vs Fainu as the directional player is the most likely outcome. Fainu is probably the most likely as Galvin's body type might allow him to play other positions.
Luia or Fainu plays 7. Doesn't REALLY matter who. It's the role they play on the field that matters. Fainu is more your Foran/Cliff Lyons type imo.