would be cool if there was a 'strategic durden attack' 

basicly what i had in mind was , we pay a large amount of credits to spawn durdens in a new style where waves of durdens spawn and attack us

starting on wave 1 where they are all easy to kill with no BGS 

and gradually as the waves get higher more durdens spawn with increased stats ending on wave 20 where a certain amount of tyler clones apear with lots of BGs

sucsesful wave completions with in a certain time give a random player that contributed an attack timer refresh perk that can be used to instantly put attack timer to 0 seconds and is not regiftable

every 20 credits would give an additional wave of durdens

this idea needs alot of work and balancing but there is a good idea here somwhere

Pay to have NPCs attack people? 

-1 

There is already an event like that and everyone does everything they possibly can to avoid triggering it. 

they attack the HQs and we fight them off