Upon reaching rank 2200 a player gains a new ability that can be used once a day
It removes the rank cap barrier on npc ships
This effectively gives the player access to any non-seasonal npc in the game, at the normal spawn rate , on the bt
Effect lasts for an hour or 1000 npc kills
Any shared bosses and elites remain the normal time
All npcs refresh at the normal rate

maybe a ship mission with module at the end that allows this with cooldown and some cost?

Sounds good to me

Or they should extend the rank cap for Hypergrids, Dark Command Nexuses, Troop Carriers, Dark Arms Carriers, etc to rank 9999 or something.