I know of 549 skins of which I have 536. Not sure when you updated your ELOphant score last but it says you only have 495 (I know it hasn't been working for a bit though). Anyway my point is, learn to collect n00b. Haha jk. Good job. Those last few you can't get hurt dont they.
For me it's
Victorious janna jarvan elise, judgement kayle, rusty blitz, ufo corki, black alistar, king rammus, triumphant ryze, human ryze, medieval twitch, grey warwick, and urf warwick.
At least I finally got the victorious skin this season. I'm almost positive I had judgement kayle and something weird happened, but I can't really prove it. Most sad about urf and UFO corki.
:D
Yeah my ELOPHANT client isnt working. but i have been busy buying skins like no other, cant wait :D