Version 2 of my [Ember] build.

The idea is using your 4 for damage, knocking down the heat gauge when too full using 3, and using that cycle to sustain shields and health whilst gaining boosted damage from Energy Conversion. This should happen 4/5 times you use your 4 (literally 80% chance to get at least 1 energy orb spawn if you kill all 10 targets of your 4 before they stop burning).

Can swap Primed Flow out for Streamline/[Fleeting Expertise] for efficiency.
Alternatively you can swap [Primed Flow] for [Augur Secrets] to fit either [Adaptation] or [Umbral Vitality] (requires formaing [Healing Flame]) for more tankiness.

Aura forma lets you swap between [Growing Power] or [Energy Siphon] if you have energy issues.