I think you've made a mistake in bloodied rage. It says "while bloodied the rage drake automatically ends all effects a save can end"
This would mean that no save could stay in effect.
I'm sure you meant "when"; as a one time affect I would put it in the Rampage ability, so it triggers off as that is used; just for clarity.
The damage immediately after being bloodied will be huge, with the draconic fury quite possibly hitting with all three parts. Do the powers recharge, then get expended instantly, or do they remain recharged until used outside of Bloodied Rampage? I'm not quite sure how the RAW would interpret that, so just wondering.
Oh, and Bloodied Rampage could completely fail if the Drake is damaged by a ranged attack, and no-one is standing near it when it gets bloodied. Is this intended?