I had this same question. OP answered with some recommendations for gear, but I'm more interested in skill point allocation. Is there some hybridized version that opens up if the demon machine account no longer needs to invest in max enchant, etc.?
I have never played the demon machine sorc, I likely will at some point in the future. However, I suspect that even if another sorc enchants the demon machine sorc, the demon machine sorc might need to max Fire Mastery in case that damage is checked by the algorithms when attacking?
Maybe more points in static can add range to your static, especially for builds who will have less +lightning skills?
More points in ES to be more tanky?
Max warmth will help to recover mana after hits on ES.
Branching out to other elemental damage skills (like cold) might be hard on this build, but I heard the core build is very good. This is even better since sunder charms came out to break immunities.