I seem to be having a hard time these past weeks...dunno why. I can't get under rank 16 where I always ended at Rank 11-12 in the past (not much but i'm ok with that). It's been getting very frustrating and I feel like quitting for some time, nothing is going my way since september...
I play mainly a Paladin deck that looks like this:
1X Humility
2X Equality
1X Holy Light
2X Wild Pyromancer
2X Instable Ghoul
2X Deathlord
2X Aldor Peacekeeper
2X Truesilver Champion
2X Consecration
1X Defender of Argus
2X Stampeding Kodo
2X Sludge Belcher
1X Black Knight
2X Sunwalker
1X Guardian of Kings
2X Avenging Wrath
1X Lay on Hands
1X Tirion Fordring
1X Ysera
I've been having great success with this deck for quite some time but now I keep losing at Ranks 16-18 with this...maybe it's time for a change.
Well it looks like you are going for a control Paladin. The first thing that sticks out to me is the lack of card draw. Your only card draw mechanic is Lay on Hands, an 8 mana spell that basically consumes your entire turn. What this usually means is that if you use it when you have board control, you are probably going to lose board control the next turn because you used your entire turn on a spell that doesn't affect the board at all. If you have to use it when you are already behind on the board, you've likely lost the game already unless it draws something extremely clutch (eg. it draws an Equality and you already have a Wild Pyro on the board). That's not to say it's a bad card, but it is unreliable as the sole card draw mechanic, and it can be very difficult to find a good time to use it safely.
The other thing that pops out are 2x Unstable Ghoul, 2x Deathlord, and 2x Avenging Wrath. I would get rid of both the Ghouls, they just don't seem to fit the deck all that well. I would also get rid of at least one of the Deathlords, maybe even both of them. Same with Avenging Wrath - one is fine, but two is probably overkill.
Use these open slots to throw in some card draw. You can experiment with what works best, but I'd suggest at least two total of any of the following - Acolyte of Pain, Gnomish Inventor, Azure Drake.
If you have them, Cairne, Sylvannas, Loatheb, and Ragnaros all fit well in a control Paladin deck (you'd probably have to take out one or both of the Sunwalkers to fit these in). Some other options to consider are Harvest Golem, Shade of Naxxramas, Spellbreaker, and Earthen Ring Farseer.