Storm Chaser

Rotation: The Azure Span > The Azure Span > The Azure Span > The Azure Span > The Azure Span > The Azure Span > The Azure Span > The Waking Shores > The Azure Span > The Azure Span > The Azure Span > Thaldraszus (the one you already have) > The Azure Span > The Azure Span > The Azure Span > The Azure Span > The Waking Shores > The Waking Shores (its the same type as the previous one) > The Azure Span > The Azure Span > Ohn'ahran Plains (FINALLY, oh wait, its the one you already have.) ................ This game.

The more I'm looking at this achievement, the more I'm thinking that this is actually just crazy. The worst possible one from the bunch. It beats dirt farming for treasure maps. It beats scroll farming in the Forbidden Reach. Here's the breakdown:

There are 4 different zones that can spawn storms in the Dragon Isles. There are 4 different elements that a storm could take. If you were after, say, a sandstorm in Thaldraszus, you'd assume that this would be a 1/16 chance of seeing it every single time that a storm spawns. It would make sense, right? But that's just not the case.

Thaldraszus has one possible location a storm can spawn. The Ohn'ahran Plains has one possible location a storm can spawn. The Waking Shores has two possible spawn locations. And The Azure Span, dear reader, has three. What happens is that the game decides every three hours to spawn an elemental storm in a zone, but it does not choose between the zones itself. It chooses between the spawn locations of every zone. So, instead of each zone having a 25% chance of getting an elemental storm each cycle, there is a 14% chance for a storm to spawn in Thaldraszus, a 14% chance for a storm to spawn in Ohn'ahran Plains, a 28% chance for a storm to spawn in the Waking Shores, and a 42% chance for a storm to spawn in the Azure Span. That is why it seems every storm shows up in The Azure Span. It's completely skewed in favor towards it.

If you were after a sandstorm in Thaldraszus, like I said before, you would first have to get lucky enough to have Thaldraszus chosen as the elemental storm zone (1/7 chance), then you'd have to also have it be the element that you need (1/4). Together, this is a 3% chance. A 3% chance every time that a storm appears. Keep in mind that storms show up once every three hours and that the average person isn't going to see more than two or three of these per day. I know that this is part of the no-life meta achievement, but this is completely ridiculous even for no-life standards.

The achievement used to be much easier to do: two storms used to be up at a time until Blizzard reduced this to only one in 10.0.7, and the Temporal Conflux location in Thaldraszus used to be a spawn location before it was removed to add in the Primalist Future world event. Expect Blizzard to do something to alleviate either the rotation or frequency for this like they did with the "Things To Do When You're Dead" achievement for the Shadowlands meta.

Bit of a shame Blizzard wasn't more clear in their approach to zone Storms in 10.0.7: in .5 I didn't have a lot of time to farm this nor was I particularly interested given there wasn't much to get from Overflow, no tokens and/or upgrade items. Now, only one Storm spawns at a time. I'm not really sure why this was changed, but this just turns it into a 1/16 gamble whether the right zone and element combination is up... besides the fact that it has to be done on one character and just killing 200 mobs is incredibly boring: you're essentially looking for a raid group or to find non-elites to zerg relatively fast. If you start it now you need at least 48 hours (16 cycles), but it's more likely closer to a week, as zone/storm combinations are random and repeats will occur.

Do you have to do it? No, but once you start you're automatically pulled towards finishing a side achievement whenever a combination is up you still need. I highly recommend combining this with the [faction=2550], [item=202017] and/or [item=202173] farms whenever a Storm is up in the affected areas.

I have some experience in farming this now, so some pointers per subzone that I've farmed in, most convenient from top to bottom (will update as I go):

Waking Shores

1. 
   
2. Obsidian Citadel: not easy to farm, but not terrible due to player traffic and allows double dipping [item=202173] and obsidian keys!
3. 
   
4. Slagmire: quite a few non-elite elementals to kill and quite easy to find a group for, but not as convenient to navigate.
5. 
   
6. Scalecracker Keep: pretty annoying, not a lot of affected mobs. The indoor hut with [npc=191507] works quite well though.
7. 
   

Ohn'ahran Plains

1. 
   
2. Nokhudon Hold: packed with elites, not terribly easy to solo but quite easy to zerg in a raid. Regardless, it's the sole zone in the Plains.
3. 
   

Azure Span

1. 
   
2. Cobalt Assembly: amazing! The buffs help speed this up and you can farm the [faction=2550] simultaneously.
3. 
   
4. Imbu: not as efficient as the Assembly, but quite packed and you get [item=202017] if you haven't finished that yet.
5. 
   
6. Brackenhide: ugh. The beach area is probably the best to zerg, but it's a drag. You can get Rousing Decay, but meh.
7. 
   

Thal'draszus

1. 
   
2. Tyrhold: pretty relaxed, there are a lot of 'small mobs + one elite' packs on the lower levels. Regardless, it's the sole zone in Thal'draszus.
3.