If all works out, our window probably opens with the 2023-24 season, and with a very good top 6, we would be well served to have an awesome complementary 3rd line of, if they develop as seems likely, of Pinto + Greig + Maroon-type mauler.
Whatever gets Greig, and also Pinto ready to win 3rd line battles by the start or middle of 2023-24 will go a long way towards determining how far we can go. They could equate to Tampa's dominant 3rd line with an added solid veteran.
Later, when Giroux starts to drop out of the top 6, right now Greig is the best bet to replace him of our current talent.
Greig may have a better chance of developing 3rd line style at the NHL level, rather than the AHL where he would likely get more focus on scoring and helping carry the team.