um, I'd recommend specializing in what you do best. I'd go 16 at least to start with, and bumping Cha at least every opportunity. You're a big scary ice dragon! I mean, if Eblue won't be annoyed by lasting frost stuff, sure; go wild. Otherwise, what else makes you a big strong dragon?
Sorcerous blade channeling means you can attack in melee, and if you decide to add a str-based PP or MC option at any point you can use it for other attacks. It's a good emergency-needs feat for you, if you get mobbed or grabbed or something.
Or, if you prefer, you could beef up your Dex or Int for some level of AC/Ref bonus. Considering Scion of Arkosia, you will be mobile and dragony, which means getting attacked at range, which means reflex or AC. You should take some option for that feat-wise, even if that means leather armor feats.
If you're choosing items, consider that you'll be resistant to at least one energy type, possibly 2. That leaves you many other avenues of being murdered by our kindly DM. Resistance armor is your friend.
Skills: Intimidate is a must, for a dragon. You've got Cha and Str, so if you can get Athletics you should.
Otherwise, think of what shores up defences, adds to attacks, and moves you around. And what would be fun in play (hat of disguise? fan of fart-removal?! Or even just character-illustrating items, like an ever-smoking pipe)