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.

Dashers Restoration 3 casts · sequence

Spell	Casts	Per min
Chain Heal	2	18.0
Earth Shield	1	9.0

Paladb Protection 3 casts · sequence

Spell	Casts	Per min
Hand of Reckoning	1	9.0
Shield of Righteousness	1	9.0
Holy Shield	1	9.0

Sset Shadow 1 casts · sequence

Spell	Casts	Per min
Mind Sear	1	9.0