Hearthpwn

Hello,
So after I had made a post similar to this, I changed my decks and picked two classes two focus on. Currently, since my collection is shallow (http://www.hearthpwn.com/members/HuzoTheOz/collection) I could only build these decks that I found online.

This one is a basic shaman deck with some upgrades (http://www.hearthpwn.com/deckbuilder/shaman#473:2;22292:2;390:2;42045:1;491:2;22265:2;214:2;270:2;676:2;613:1;22270:2;35226:1;33160:2;280:2;256:1;636:2;33159:2)   

This one is a midrange shaman deck without some core cards (http://www.hearthpwn.com/deckbuilder/shaman#473:2;35234:1;22292:2;390:2;491:2;22265:2;214:2;270:2;676:2;613:1;22270:2;33160:2;280:2;22271:2;636:2;33159:2)  

And this one is a budget tempo mage deck with cheap stuff (http://www.hearthpwn.com/deckbuilder/mage#589:2;263:2;30:1;74:1;56:1;177:2;479:1;435:2;4:1;428:1;489:2;35187:1;522:2;246:1;31111:1;595:1;274:1;280:2;33178:1;220:1;42025:2;44:1)  

After playing these decks, I found both the shaman decks very similar. (Does very good job against rogues druids and terribly against warlocks mages and any class with good board clear)   

And the tempo deck had a pretty sloppy performance. (there were many games that I was surely going to lose but somehow I won with RNG, drawing flamestrike exactly when needed etc. ) And there were games where my spells were pretty useless with much stronger aggro decks (warrior paladin)   

So in a nutshell, how can I improve these decks with the collection I have. Lets say I want to play a particular deck I cant afford, which type of cards can I replace and according to what?  

There was one more idea from someone else. Which was to pick a class, disenchant every other class card and build a strong aggro deck to climb and learn the class well. That was a good idea but I believe I would regret it in the future.  


Thanks a lot in advance for the suggestions