The monthly pve event would be a strike playlist with 300 light required and the awesome part is that the strike exclusive loot (grasp of malok darkblade helm etc.) Would be increased to the point where you'll get one every strike along with a legendary engram the drop rate for 3 of coins would be increased as well not 100% but by enough to notice the strikes would be fireteam exclusive no matchmaking and ALL the strikes will be in the playlist (all of them need to be upgraded anyway)
The stokes would have to be difficult as well comment what you think would be a cool modifier for them
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Strike time trials might be a good idea. See who can run a strike fastest etc.