raidboss: ex4 switch impact trigger (#4696)
raidboss: ex4 switch impact trigger (#4696)

Workaround for a possible timeline trigger issue with tracking Impact. This uses different spell that is also related to the knockback and has a cast time. Using the "standard" 5s timing, although the spell cast is almost the same as the knockback immunity duration.
quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot