Sykar
Arcane
I was wondering where you getting these numbers from. Talk about cheese, lol. Those blood havoc feats are totally broken-as if cross blooded weren't enough! Looks like fun though. The doubling of HP in 3rd edition really changed how you need to play wizards/sorcerers.
Well you do lose 1 spell known per spell level, so 9 less spells known, and you suffer -2 to will saves. How strong the crossblooded is depends entirely on the bloodlines chosen. Orc/dragon rivals AT in terms of damage output but is hardly good for anything else, unlike AT who can double up as a thief. Biggest drawback is that the bonus bloodline feats from both, orc and dragon, are lackluster. The two best are Toughness and Improved Initiative, the rest is niche or outright bad for pure sorcerer. Going AT on sorcerer is also a pretty questionable choice because you are now 2 levels behind wizards in terms of spell progression. Level 9 spells at 19? Level 3 at 7th level instead of 5th? Ugh, not good.