If focus is upon completing the Strange Weather achievement, Crescent Reach Puma cave is the place to go.
Went to Icefall, went to Halls of Honor, went to DL/KC, none have the number of mobs/repop rate that Crescent Reach does.
As a ranger I killed 100 'a young puma' in 10 minutes 42 seconds. Repops are 1 minute 40 seconds.