Since I've got to that point (100 games), can I ask, what is the point of rocket clusters?
You can't use them unless there's a cluster nearby, which usually only happens during Lunar Festival.
Maybe something like Love Rocket (which can be used anywhere) is better?
Or, if that's BoP and causes problems, maybe Snake Burst Firework, Yellow Rose Firework, Blue Firework etc?
And Perpetual Purple Firework as the ultimate firework gift for 400 games?
Final idea: if none of the above fits your purposes, could you bundle the clusters with Cluster Launcher xd?