Issues regarding ongoing event

[Cinco]

OOOOH so luck doesn’t have anything to do with rare VANITY drops or how often I drop a van?

Correct. Luck influences stat gear; not vanity drops.

And tell me cinco have I just been unlucky with drops? I have been farming since the event started and still no X-ray or desert strike

Yep. Sounds like a streak of bad luck. As you've indicated, it's not like these items don't drop at all (you've seen others drop them); it's random.

Also does any in game item affect rare vanity drop chances?

No. There are no game item effects that influence the chance that you'll loot a vanity.

Best wishes and good luck hunting the vanity items you're after! :-)