REMOVE ALL HEAT from ranked missions
MAKE THEM ONLY AVAILABLE via Arcade/Danger Missions/Prestige Missions
INCREASE Heat payment in arcade by ~10%
This will make most of the players 4* and below forced to take the Prestige Missions(One time a day) OR the Arcade to get their heat, thus reviving Arcade Boss Runs and ultimately Reviving the Arcade.
I would say to remove all materials instead, maybe take around a third of the heat instead of all of it.
And this is how you roll out.