Howdy. You’re a bit far from the standard gear for a demon machine sorc. Also bring level 57, new in Hell, with dependency on an element, it’s going to be a struggle for a bit.
First would be a fire sunder or infinity. Then you need to ensure you maximize your enchant buff. Also then need to maximize your -enemy fire res.
Angelics is not needed as you don’t need AR. Go for +skills with mods for now to boost your enchant level, even if you’re not running a buff gear swap. Grab Horazons gloves to go with boots. That solves IAS, CBF and gives a massive fire damage bonus. Socket the demon machine with a fire facet to boost effective damage.
Don’t worry about fire dmg SCs these are useful once you’ve maxed the big stuff (don’t pinch penny’s when dollars are missing).
This build will nuke most areas once levelled a bit more and geared. Enjoy the grind!