I mean, Lakia still played really well in Shanghai. But looking at it, all of the players at least peaked when they won the trophy (Boostio, for example, was fragging pretty heavy, he did not look nearly as good after champs.)
I think Lakia was incredibly important for GenG, especially since it seems he played an important role for mental and calling. But he didn't really individually peak during their trophy winning run. He was much better at Madrid, Champs and the regional matches imo.