Handlock has a few cards that can be substituted VERY easily. The template needs to be followed and Leeroy Combo is generally accepted as great but not entirely necessary but other than that you are free to follow as you wish. Most Handlocks decks will look so damn close to yours. Mine is the same but with a few exceptions.
-1 Shadowflame, +1 Faceless Manipulator. The extra Faceless is more useful to me than the extra Shadowflame. That might change given the high amount of Aggro but being able to make an extra Taunted Giant/Drake and still be able to pull off the 20 damage Leeroy combo has helped me more than the extra Shadowflame or increasing my chance of having it.
-1 Ragnaros, +1 Bloodmage Thalnos. Cheap spellpower that also cycles nicely. Playing it with Mortal Coil can help quite a bit. Ragnaros is really slow. With Mountain and Moltens coming out by turn 5 or so, I think having another big dude is generally not super useful.
That is how it usually works. You can trade out 1 Shadowflame for Faceless or give up Mortal Coils for other cards (often Shieldmasta) and the one Legendary is in flux. Some swear by Alexstraza while others fall into line under Jarraxus, Eredar Lord of the Burning Legion. I just recently got Thalnos but it was Black Knight for a while to stop other Handlocks and Ancient of Wars. Your deck looks great, though I would dump Ragnaros for something a little faster. Cairne, Sylvanas, Black Knight, Harrison Jones, or Thalnos *could* be better.
The main thing is to identify if the opponent is Rush or Control early. Against Aggro, I find that Handlock is generally favored but it comes down to bad luck. If you don't get Ancient Watcher, Twilight Drakes, Molten/Mountain Giants, Hellfire, Soulfire, Sunfury Protector, or Defender of Argus there is generally very little you can do. At the times that I get the perfect hand of double molten giants with Argus and they beat me down to 10 so I can double Molten Argus it seems as if the deck is unfair against Rush. When you can't get the Taunts or the Earthen Rings you wonder how the hell the deck is even good.
It is a lot like Ramp Druid in that regard. When you don't get Innervate, Ancients, or Wild Growth the deck doesn't seem so great. With Handlock, when the Top Deck Fairy hears your cries for help and whispers "No" there is not much you can do. Luckily, there are a lot of things that you have to not get to just get bent over a barreled and spanked. I would suggest watching some games a Streamer has done with Handlock. Trump has some decent videos and explains why he is making a decision. Even when the decision is wrong in hindsight, you can still get a GREAT explanation of each decision in the deck.
Good luck with the deck! I love my some Handlock.
Edited by Azernak0 on 7/4/2014 11:14 PM PDT