1) Feel free to run on into our Chaos forum at
www.40k.ca where your EO account works, as they are sister sites.
2) Yes, you can, however this will prove to make them extremely expensive and is generally not a viable tactic (One Battle Cannon or WarWalker/StarCannon combo and you'll be losing a whole heck of a lot of points).
3) This was the point in time where most Thousand Sons players had a siezure when they dreamed of entire squads of Sorcerors with Bolt of Change. Unfortunately, it made each model 60-70 points with nothing more than a 3+ save to protect them.