Death Knight Learning Curve, a Good Place to Train
In HFP, there’s the Valley of Bones, close to Zeth’Gor, with buzzards which will normally aggro on death. With Death Grip, you can pull one away safely, kill it, and then start a 3-4 buzzard chain in short sequence.
These chains should be a good way to get really familiar with the cooldowns of abilities, and if you’re blood or unholy, death rune buildup and consumption.
Bonus point, the buzzards can also be integrated in a quest chain at the nearby Zeppelin crash site (after stealing ravager eggs and purifying hellboar meat), and there are tons of Zeppelin debris around for the collection quest you can get at the same place.
