Nuking Build for [Ember].

Due to your passive granting you power strength its not as important to get high power strength as you'd think. But if you feel like you need more power strength you can replace [Brief Respite] with [Growing Power] this way you'll need 1 less forma (no aura forma needed).
Another option is to swap [Augur Secrets] for [Transient Fortitude], however, this makes your status duration on your abilities too low to realistically utilise the passive.

All you need to play this build is to mash the 4 key. And if you are against armoured enemies and your damage is falling off, you just need to use your 2+3 however getting used to managing the resource meter takes a while to get used to.

Additionally, You can infuse thermal sunder to :
a) be able to nuke enemies outside your line of site, while its less range than your 4 its a reliable backup.
b) combo with any heat procs from your other abilities (3 or 4) to get the blast proc nuke from combining them with cold sunder.

Energise is very helpful for topping off your energy and is very reliable because of [Exothermic]. Aegis is an optional slot, you could also go with strike or [Guardian] or anything you want, aegis is just a nice option to give you partial shield gating alongside [Brief Respite] so you can continually cast.

As a bonus, if you ever get [Ember] +300% in arbitrations the damage is absurd, I've seen blast procs from sunder ranging from 200k all the way to 800k (even to ancients with they 90% DR), and Inferno deals 15k/30k just with the initial impact.