True it's a mana hog, but back in 1.09 I have a nova sorc without insight, she runs along just fine. Sure, she can toss on gear to jack her mana up around 3k, but if I do something such as MFing she can get by with a lot less. While Insight is gg, it can be replaced by other things.1. Insight is almost mandatory, and you'll still need to drink blues fairly frequently. Nova is a mana hog.
Gogo 10+ Static2. Static Field is also important, but you'll have lots of lightning skill bonuses, so that's easy enough.
Hardly. Maxed nova/mastery with 5-7 +skills is probably adequate for a poormans build. Static things down as far as you can and you don't need 1.3k damage to take them the other half, really. Especially if you're using backup skill with a timer like orb. Static, orb, spam, see what's left.3. As much + skill gear as you can safely manage. You really do have to boost Nova and mastery to at least level 30, the higher the better.