What tins to buy?

Hi all, I'm a mtg player looking to have a bit of fun with pokemon.

I'm looking at the best way to buy cards and other than 2nd hand tins seems like a good bet with a guaranteed ex card.

My question is out of the xy set which two tins do you think are the best?
I like the look of yvelta and possibly greninja.

Thanks

You must get all of them my friend.

Surely it'd be better to get four of one for a playset than one of each

Yveltal is probably the most competitively viable one right now, though the next set coming out is dedicated to Fighting types, which a lot of the cards that Yveltal EX pairs with are weak to.

Yveltal EX, the team plasma tins, Darkrai EX, Mewtwo EX Keldeo EX are good tins to buy right now. Avoid Delphox EX, Greninja EX, Chesnaught EX, Rayquaza EX Black/White Kyurem EX. The rest are fine but not great.