Well Arcane isn't exactly a steady spec either, especially in AoE. That said, you need significant gear to reach the crit cap with trinket procs which I consider to be mandatory to make the spec steady. As I previously posted, Fire is actually very steady IF you can get Sandman's to proc without too much hassle.Dont looking at the current arcane but:
Is this not was fire was allways. Only the median is a little bit lower currently. Thats why no one was playing it at progress because it lacks steadiness.
On that note, I thought of a potential solution. When trying to get Sandman's to proc we should consider switching to Scorch, Inferno Blast, and Pyroblast as our primary damage output to have the best shot at quickly proccing the trinket. I'll play fire again next week on most of the bosses and see how that goes, I don't think it will be too costly in damage since we do very little outside of burst phase.