I’m playing RinLock deck from r5, and have reached r2 consistently. My deck includes Mountain giants, Stonehill defender, with extra cards from new expac, namely Lord godfrey, Voodoo doll. Giants on t4 is always great, with voodoo doll, you have a 4 mana (combine with coil or dark pact) kills any minion. Super good when you have earlier Giant than your opp, then just kill theirs with 4 mana.
With lots of board clear, heal and taunt, the deck stalls easily against aggro deck (except odd hunter, warlock has slight disadvantage since they can just go face with hero power) and out value them later in the match. And Rin doesn’t do much in these match up (well at least she can taunt for 6 dmg).
Vs midrange deck, like spiteful decks, it’s Rin time to shine as the opp can’t keep up with strong removal and board clear. Once the board is stablized, you go for Rin’s Seal.
Against Control. There’re not many control decks out there. But control often don’t do much in early/mid game, if you have Rin’s seal early, it’s gg. And even you get her later in fatigue, both players run out of steam but with the seal, you will have more advantages over your opp.
The deck is pure control, and only win early if you manage to have early Giants and keep them alive by remove opp’s threats. If not the game goes extremely long. Even vs Odd Paladin, it takes 10-15+ mins.

What do you think about Countess Ashmore + Swiftness Messenger in the deck? Some draw is great since you won’t ever go to fatigue in these days, drawing a deathrattle (Voodoo doll or Rotten Applebaum, with a pseudo fireball can be great IMO). While Swiftness Messenger can be used to trade in early game with 2/6 rush.
Also I’m afraid this deck will lose hard to Shudderwock Shaman, RinLock, and struggle a lot against CubeLock, which are certainly Tier 1/ top t2 decks.