I had some time during a lunch break today to look at MM AoE in the APL.
The following tests some action changes and lack of actions within MM AoE conditions over a 15s fixed window for 3 and 5 mobs. Among the things I'm varying here are:
1.) whether under ts (true shot) or agi potion (only applicable for a little while longer)
2.) not using Aimed Shot (noais)
3.) no barrage (nobarr)
4.) using marked shot immediately after gaining Hunters Mark debuffs
"norm" == "normal rotation in the current MM APLs". I used the default MM APL posted on the MM Simc discussion for 1-3, but #4 is definitely not included in the current MM APL. It is underutilizing MarkS during AoE periods and this results in undervaluing MM AoE by ~15%.
Three Target
Five Target
Simcraft source
Basically, this outlines some pretty fundamental things about AoE situations for MM:
1.) It's pretty damned important that you keep using AiS. You cannot just pool focus for MarkS and Barrage and use Sidewinders on CD. You have to be intelligent about each usage.
2.) The MM APL should probably be updated to include using MarkS when Hunters Mark is up in a much higher priority when sidewinders is enabled. For most hunters this is pretty obvious. The interaction between Marked Shot and Hunters Mark is extremely powerful, and parsing on fights with AoE is going to revolve around not only continuing to use AiS properly, but also taking advantage of MarkS with HM and obviously using Barrage at a reasonably high priority.
Barrage will be roughly 20% of your damage on 3 target aoe segments and ~22% on 5 targets, scaling up from there. Positioning for maximum Hunters Mark targets with your sidewinders is going to be a huge factor in your AoE dps. These sims assume you hit ALL targets with your sidewinders and apply HM to all. You should practice your SW so you understand the blind spots and how these SWs move. You also need to get used to clicking targets that are farthest away, but in range, or more importantly, positioning yourself in range of the farthest target as/before the adds come out, and adjust your angles so that you hit all adds with SW. Then use your MarkS appropriately. You want to make sure you are consuming those HM before the adds die.
- - - Updated - - -
About MM Artifact Relics:
The following tests different relic bumps from Storm, Blood and Life. This can help you with optimizing MM relics in Legion, but there are a few caveats about what this really means (and a bug in Simcraft).
Simcraft source (max_time=450s, 20% dev, 10k iterations)
The bug here is that increasing levels of Called Shot is not actually increasing Sidewinders damage. Should be a simple fix in Simcraft. So, cs4-6 are undervalued and performing at same level as not having any relics.
Here are some things to understand about relics (and this includes some information from sims that I haven't posted yet involving ilvl upgrades):
1.) Each raiding gem tier upgrade (e.g. heroic version to mythic version) will contribute 1.2k-1.5k dps by item level increases alone to your weapon. So, going from heroic relics to full mythic raiding relics will be ~3.6k to 4.5k dps. That's ANY relic, not just the specialized relic trait upgrades.
2.) The mythic dungeon gems are around ~3k dps under the heroic raiding gems.
3.) The best relic to get while leveling may be +1 to Quick Shot (reduces cd of Trueshot), simply because of quality-of-life improvements (getting a big AoE cd more quickly for trash between dungeon bosses, for instance) but according to sims, when you get the core traits done in MM, you appear to get more from MfD as it has good interplay with Deadly Aim (crit damage for AiS). Precision is pretty damn good too.