Short answer is you’ll be doing it wrong.
It’s more complex than most specs in m+, if not all. You’ve got to get the setup right, and this changes depending on every pull due to number of targets and how long the pack will live.
If you’re not up for the challenge of mastering it, yes, just reroll havoc and you’ll achieve the results in a day.
Sim yourself on patchwork, 4 targets, 40 seconds. That’s the sort of AOE burst you should be doing every couple pulls with CD’s up.
It’s extremely likely you aren’t executing the rotation properly. Here’s the opener for AOE burst:
Outbreak
Dark Transformation
Unholy Frenzy
Festering Strike 1st mob
Festering Strike a 2nd mob
Dump all RP on Epidemic
Apocalypse any mob with 4+ wounds
Drop Death and Decay
Blood of The Enemy and Trinket (macro)
Scourge Strike spam
Try not to overcap RP, use on Epidemic.
Profit with like 300-500k burst at decent gear lvl on a pack size of 5-7.
Our openers are complex, there’s often 10+ buttons that need to be pressed in the exact right order before the burst really begins. But done right, the burst is INSANE including on single target with army and hero.
Not many have the patience to master the complexities though. I constantly get asked how I do the dmg I do by ppl who have rerolled from Unholy to play FOTM classes like havoc or BM. So if you’re not up for it, just reroll.
Editing this post with a bit of advice for low keys. Unholy isn’t great when things die quickly, but a couple of things that can help patch this up a little:
Festersniping. Best example of this is pulls like the sorid packs in AD. Even in high keys they die fast. To maximize your damage, and buff yourself up for the next pull, you can do what’s called festersniping (works better with festermight traits). To do this you simply fester strike mobs that are going to die first. Stack wounds, and when it dies, the wounds will all pop and AOE everything, plus give you a bunch of festermight stacks which can be carried through to the next pull.
The other thing is just to open with outbreak, 1 fester strike, put dnd down and spam scourge strike and epidemic. It’s sub-optimal but sometimes the best way to maximize damage if things are dieing in 10 seconds or less.
A good rule of thimb to remember is that you want to try and time your dnd ending, just before the pack dies. This means you spent the maximum amount of time getting wounds out beforehand.