What skins should I get bcuz of the sales?

Tyrant Swain is a must! He'll be 675 Eternum Reksai is a really meh, I don't like the portals... dem look like vacume cleaners. Hes 675 also. Warden Karma is 750, not on sale doe. I really want it but could wait for it to be on sale. Arclight Vayne is 682 atm. I don't main vayne, but I really like her kit and play her some. Its normally rly expensive.

RIght now I rate them at Tyrant Swain, Arclight Vayne, (becuase theyre alot cheaper) Warden Karma, and Eternum Reksai. In order from most wanted to least. Please help me!