WHAT SKIN SHOULD I BUY??

Hey guys!!

Ok, so I was wondering which skin I should get with my 1.9k rp remaining.

I wanna get either:

1. Arcade Ezreal - I have no ezreal skins
2. Project Ekko - No other ekko skins (I play these two as often as each other, while I like ezreal as a champ a little more)
3. Dark star thresh (THIS WOULD be my #1 but I already have blood moon thresh...)
4. Project Ashe (skin is AWESOME but I don't like immobiel ADC that much)

Its mostly between the first two but anyone with those skins help me out??