This is My general do it all [Ember]!
The Exilus slot can swap out for [Sure Footed] if need be or add an extra forma for Prime [Sure Footed]
Exothemic is the free slot, I usually swapping it for [Healing Flame] for extra survivability when needed or [Natural Talent] for faster cast times for slight more DPS.
Helminth: With this set up [Ember]'s passive and Fire Walker, allow for more mobility and to [Reach] 90% on Immolate. It also adds a little CC. This is a versatile build though so a little lose in Immolate protection 85% allows you to swap this ability out as well, depending on what you are building for, but [Firewalker] is the go to.
[Adaptation] vs [Rolling Guard]: Honestly either goes well here, if you prefer one use it. I choose [Adaptation] because it stacks well with Immolation for a LOT of damage reduction, when combined with [Brief Respite] and [Healing Flame] she becomes almost invincible. But avoiding damage is always better than taking it so if you are skilled enough and feel the survivability this build has is enough already feel free to swap this out for [Rolling Guard]. I am lazy and forget to roll so [Adaptation] is the default.
This build is inspired by concepts from both Grind Hard Squad and Brozime, both of whom are much more knowledgeable and skilled than I am this. This is My humble attempt to combine their ideas. Also so I can look this build up when adding more forma.