So guys before starting to yell at me and call me huntard , i want to let u know that i love hunter and i will keep playing it . So the problem is that in the past few days i have the feeling that the midrange deck/ face agro deck is not working anymore . I've dropped like 6 ranks for 3-4 days , because suddenly my deck is extremely weaker than my oppononets? Whats happening i reached rank 6 and then i dropped so fast i cant even believe it ? Is the meta changed? Buffed some cards  / nerfed hunter cards? These are the decks im using currently - https://www.icy-veins.com/hearthstone/legendary-hunter-midrange-brm-deck and photo. Help , please?!

Ok so here's the deal: I've spent hundreds of dollars on hearthstone. I thought that if I had better cards, I'd be able to build better decks and climb to legend status in the ranked game mode. I look on icy veins and hearthpwn for decks, and copy them to a tee. I use the ones that say they can make it to legend. I've been playing A LOT, even with the "super" decks, but I still can't win. I can't make it past rank 18.
 
I heard that 18 was the hardest to pass, but I'm losing against people who I'm sure haven't spent as much money or time as me. It doesn't seem like the decks really matters. I realize it is a game of luck, but (as I'm sure you know) my decks are good for most situations.
 
Am I doing something wrong? I can detail my play style or add you on hearthstone or something. I desperately need help. 
 
A guide for what strategies to use, an actual good deck list, or anything else that you think may help would be greatly appreciated!
 
By the way, I play as druid mostly (my favorite) but I also like mage, then hunter, then warrior.

So I've never really bothered with ranking on immerseus before but because progression is over I'm doing my best to push ranks for fun. Unfortunately I can't really seem to figure out the trick to immerseus, 425k on my last heroic immerseus I had thought I'd done well and that the reason I couldn't rank was we got an extra phase or 2 but 4:16 isn't a bad kill time, not amazing but it is rankable.
 
http://worldoflogs.com/reports/rt-zjsmhcwvxxma5amr/sum/damageDone/?s=835&e=1091
 
I don't see how people are able to get what they do on the other logs, I can't seem to even get an incinerate off on them sometimes, I stopped using Mannoroth's fury for rain of fire cause it just seemed redundant. Anything off about the kill?

Hey guys. Could someone give me a recap on the state of the DK class since MoP came out.
I have played end game raiding content for years in multiple classes, but I love my DK and want to come back to WoW. I would love to know the basics of where we fit relative to the other dps classes in end game content. Are we desirable in pugs? Frost vs. Unholy dps? If possible, the pvp situation on where we rank in BGs and arenas would be helpful.
A breakdown of the past year and where DKs are going would be greatly beneficial. Thanks.