[Nerfix]

As for Red Dragon, I can sum it up with two words: Solar Disc.

As for Blade Wind costing gems, Graeme summed up well. What makes you think that having it cost earth gems you must earn and micromanage is less drastic than making it less powerful?

Research nerfs are worse because it eliminates a spell that required a 4+ Air mage to be used more than once, max twice per battle until a high level of research.

EDIT: I also pretty much echo Graeme. Why not just start with porting CB for Dom 2?