Strongest Ember build. One shots basics in steel path. Lacks range for speed running missions but amazing in survival/defense, range is still quick amazing.

Use Fireball on enemies that aren't dying. Very good focus fire for super tanky enemies. Hold down the button to charge the shot for a Megumin style explosion level damage. Aim with weapon to give the fireball extreme accuracy. Fireball also Staggers and has aoe damage added on. recasting fireball multiplies damage so nothing will live.

Fire damage is some of the strongest in the game. Along with [Ember]'s overpowered passive, the more enemies you light on fire, the more damage you will do. Fire damage + Fire Blast armor stripping + [Ember] Passive + Inferno stacking damage over time + Fireball's multiplying damage will kill any enemy in the game at any level after a few clicks. You can swap Fireball for Thermal Sunder helminth as the Fire damage is the most important part and you just want more controlled aoe, but it's a lazier tactic kit that will limit you to specific situations that Fireball comes in handy for. That being said, it's a fun substitute so go nuts.

[Primed Flow] is the most important factor in the build as you use all your abilities nonstop. Controlled spamming is helpful, the more you click abilities the more damage you multiply and the more enemies you're hurting at a time which adds to your damage per enemy. The trick to [Ember] is to watch the Immolation Gauge and keeping yourself just under max% spamming Fire Blast to lower your % is cheaper on your energy that letting Immolation sit at max%. You will never run out of energy as enemies drop absorbent amounts of energy with [Ember]. That's why [Energy Conversion] is overpowered on her. If you're not spamming you're not playing her right.

[Ember] also has a great Augment mod called [Exothermic] that gives even more energy drop chance from Inferno kills but it's not needed with the speed you will be killing, but it's fun to see all the extra energy with it on I will say. [Immolated Radiance] is also a great Augment mod on her but not very practical unless you're going all in on a support build for your [Ember] which IS possible and still very powerful but again not practical. Up to you.

Maximizing damage for steel path and beyond is simple. Spamming all your abilities along with [Energy Conversion] and activating [Growing Power] consistently is 5x stronger than needed for anything. If you're up against Grineer you can swap out [Growing Power] with [Corrosive Projection] but it isn't needed as the difference is moot with the amount of damage you'll be putting out.

Corpus nullifying shields are not an issue as long as you're spamming Fireball and Fire Blast so [Ember] is overpowered against all types of enemies. Although fire damage is held back by heavy steel path Corpus shields in most situations but there are helminth setups and weapons with Magnetic/Toxin that work amazing with the extra Heat damage proc that will take care of that easily.

[Ember] is the #1 pick for ESO as well and this build will take you far past the needed levels for C rotation. If you're going for Scoreboard numbers for whatever reason then i still recommend bringing weapons that align well with the build.

[Ember] does not need any form of Defense as lighting your enemies on fire will stagger them almost indefinitely. Solo survival may not always be safe against enemies with strong weapons as a few shots may get you here and there, this is fixed with a companion that regenerates your shields instantly with the [Guardian] mod or a [Raksa Kubrow] with the [Protect] mod though keeping a kubrow alive in steel path is quite difficult but that's up to you as the staggering will most likely make it quite simple.

Too be honest, if you're not in steel path/kuva defense/survival this build is very overkill. Maximizing range with 120+ strength is all you need for 90% of warframe as [Ember] is just that powerful. But if you want to main [Ember] this build will get you through almost all of the steel path system.

If you want a lower level max range build just swap Energy Conversion with Overextended and voila, you have the most op speed-run build for any relic run. You can also swap out [Streamline] for [Boreal's Hatred] for some extra shields with no extra cost to Fire Blast or Inferno just for ease of mind if that's your choice. I keep [Streamline] on this build because Immolation drain goes way up without it. that is the only difference but it affects the kit extremely.

Enjoy!