Naxxramas Acolyte Kill

Instants are counted from their success event and hard casts from their cast start, because the 3.3.5a client only ever logs one or the other. A hard cast interrupted before it landed still counts — nothing in the log distinguishes it. A few spells, Arcane Missiles among them, this client announces not at all: those are counted from their own ticks instead, one cast per burst of them.

Slime Arms 14 casts · sequence

Spell	Casts	Per min
Cleave	6	17.8
Revenge	5	14.8
Thunder Clap	2	5.9
Bloodrage	1	2.9

Firecracker Frost 12 casts · sequence

Spell	Casts	Per min
Waterbolt	8	23.7
Blizzard	3	8.9
Ice Barrier	1	2.9

Priestick Holy 8 casts · sequence

Spell	Casts	Per min
Flash Heal	4	11.8
Prayer of Mending	2	5.9
Prayer of Shadow Protection	1	2.9
Circle of Healing	1	2.9

Clegane Frost 7 casts · sequence

Spell	Casts	Per min
Howling Blast	2	5.9
Blood Boil	2	5.9
Pestilence	1	2.9
Plague Strike	1	2.9
Icy Touch	1	2.9

Cosmiccow Feral (DPS) 2 casts · sequence

Spell	Casts	Per min
Swipe (Cat)	2	5.9