Since i didn't have many vouchers to buy the rift gems (bought 4 i think) the only way is the market. What i did for now is to buy all the cards (except the summoners and legendaries) at least 1 copy each, later im planning slowly to upgrade them and add some legies and summoners, ideally i want all the summoners at lvl 4 and lengies at lvl 3 but seems quite expensive for now.
Anyway, thats how it looks my Rift splinters!