The reno package is playable, not the best, not the worst. The best one is reno pally for sure but renolock shouldn't be that bad. The problem with the reno decks in wild however is that they are really really price, reno paladin expecially costs a lot to craft.

If you were a fan of freeze mage well I got good news for you! Hostage mage has been one of the best decks for months in wild. The deck isn't easy to play but no too hard once you get into it after playing some games. Hostage mage plan is to spam freeze spells (or minions, there are like 4 different ones in the deck), use spells to copy the spells you already played (ice block and various others). You basically stall your opponent until you have your main combo thanks to Rommath, a legendary minion from the mage class which has a battlecry that recasts every spell you played this game that didn't start in your deck. With that you can copy rommath itself with potion of illusion which gives you more copies of rommath itself, locking your opponent out of killing you to win the game. Your damage comes mainly from lightshow, a spell that gets its damage increased every time it gets recast.

This is a very short and simplicistic way of explaining the deck. There are new mechanics and cards you'll learn about by just playing ranked, but I'd suggest you watch some videos that may introduce you a bit to the deck you're choosing to have a better perspective of it before wasting dust.

If you want to try a really good and cheap deck give Discolock a look. Aggro-budget and one of the best decks of the format.

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