reset castsequence new focus

[Wubsie]

There is no such reset condition. The ones available are:

target - You changed target (not focus)
combat - You entered or exited combat
<number> - The number of seconds since the last click
alt/shift/ctrl - Hold alt/shift/ctrl while clicking macro for castsequence to reset

Personally I often end up using a combination of <number> with a fairly low value and Combat. Seems to work OK especially since my healers are spamming 3-4 macros so I can spread the [@focus,help] spells a bit over those macros.