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.
No cast sequence can be drawn for this pull — its individual events were not stored,
so only the totals below survive. The tally is still exact.