Hey Vaxym:
1. No, you don't use Fire Nova in your cycle for a single target. But the more targets you have, the more interesting it gets. For two targets, I would recommend using FN each time there is nothing else to do. But for 5 oder more targets, I would nearly hit it on cooldown for example.
2. Since you will be opening most fights from a distance, you are probably going to open with UE followed by buffed FS.
My pulls for e.g. are as followed:
| Time in relation to pull | Action |
|---|
| -5 | Spirit Walk |
| -3 | Feral Spirit |
| -1 | Fire Elemental / Prepot |
| 0 | Start running to the boss |
| 0.5 | Unleash Elements |
| 2 | FS |
| 2-3 | arrive at boss |
| 3.5 | Stormstrike |
| 5 | Pop Ascendance, trinkets etc with next Stormblast |
| 6.5 | Usually have 5 stacks of Searing Flame, so LL / Otherwise use ES or Stormlash Totem |
3. The ratio will stay nearly the same for a long time. So, either you try to balance them or stack one of them (which then again favors the other two stats and so on. Binkenstein just released a blog on Totemspot regarding exactly that topic).