Drop It Like It's Hot

"Primalist Monster" refers to the boss.

Buy a ton of the Field Deployable Heat Sources from the vendors who spawn at the portals after it is captured. If you don't see them selling it, they will start selling it once the boss spawn. When boss gets low start clicking 'em. Plant em everywhere, get your whole raid group the achievement :)

Is this one currently bugged? I killed the boss two times with 25 charges of warmth and the achievement didn't trigger.

"Storm's Fury" refers to an event in Thaldraszus, a miniature skull on the map within the Temporal Conflux part of the map, lower right side.

I am not an expert on this event but I believe you may need help or to be very fast to complete it successfully also you may need to do some quests to unlock some things around where Nozdormu stands.

I was confused reading the comments as it didn't specify where this was it is not just any Primalist Storm it is the big one.