1. 9x 1k Sons and the Aspiring Sorcerer (10 models total), who has Doombolt, in a Rhino.
2. 312 points all up. I normally use them in either 1750 or 1850 pt games
3. People underestimate Thousand Sons, both in the codex and on the table. Somewhat hard to kill as well thanks to the 3+/4++ they get
The models I use for 1k Sons I spent longer than normal making sure the Blue armour turned out right, plus they almost always end up performing well in the game