I may just be one of the most unlucky individuals out there. This is my story...
So far, I've rerolled skins 4 times and here is what I got:
1. Aristocrat Vayne
2. Vindicator Vayne
3. Bandit Sivir
4. Totemic Maokai
My problem with that is twofold. First, I really dislike Vayne. Probably one of the few champions I really don't like to play and to play against. Not only that, but both those skins are 520 RP tier; that's the second problem.
Totemic Maokai is also 520 RP and Bandit Sivir is just slightly higher at 750 RP.
Here's the thing. The chance of rerolling into a 520 RP skin (I don't have that many skins) is about 19,96% and the chance of rerolling a 750 RP skin is 15,76%.
The chances that I'd get that specific combination (x3 520 RP and x1 750 RP) is **relatively low**; about 0,5%.
In other words, this happens to 1 every 200 players and I'm one of those :(
The worst case would be x4 520 RP (0,16%), so I'm not that far off.
I know I shouldn't be complaining about free stuff and, honestly, I'm okay with Bandit Sivir and Totemic Maokai (even though I don't play them)... but skins for Vayne? I'd rather have the essence.
Anyway, I hope Lord Teemo heeds my call and gives me a "better" reroll the next time around. I won't complain if I get, say Mad Hatter Shaco (520 RP too). That I'd be okay with.
See y'all on the Rift!