Champions This meta? (Low Elo)

Hey guys, I've just recently picked up LoL again after playing in Season 5, (went 7/3 in promos and got placed in b4, actually need 1 more promo win to get in b3 now. i understand that some of the champs i mained arent as good as they were before. i was looking for new champs to buy this meta, i have already bought Malzahar,Riven, Orianna And Rengar for starting off. I'm a decent Ori but i was thinking of asking the community what champs i shoud play this meta to climb to higher Elo! thanks :)

Keep in mind that i havent played in quite a bit and most likely dont have the mechanics or the skill to play some champs like riven (yet) though like i said im a decent orianna.[slayer-pantheon-thumbs]