Looking for help to balance early cards.

I only recently discovered mtg cardsmith and I haven't been able to stop myself from trying to make a custom set of cards to reflect a D&D campaign I have been working on for years.
I started with some of the most powerful because that is what I feel the rest of the set will need to be balanced against but I am not sure if I may have made them balanced, so I came here hoping to get feedback from more experienced creators.
The three I have made what I consider final version ideas are:
http://mtgcardsmith.com/view/irithix-crimson-dragon-1?list=user
http://mtgcardsmith.com/view/alandir-the-shaper-1?list=user
http://mtgcardsmith.com/view/taios-silverfang?list=user

The flavor behind the set is that the world is slowly being consumed and destroyed by demons and the only hope are the dragon knights and their companions. The above examples are of three key characters to the narrative so I want to make sure they are done right.

Any comments on the cards is appreciated. Please nitpick them to your hearts content.

Thanks in advance for any help.

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