raidboss: fix p8s flameviper/tetraflare combo trigger (#4850)
raidboss: fix p8s flameviper/tetraflare combo trigger (#4850)

The bird/snake casts should always happen first by a second or two, but
sometimes their names are incorrect.

Fixes #4828.
quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot