raidboss: add o5s engage timer start

Author: quisquous

ui/raidboss/data/timelines/o5s.txt

@@ -1,14 +1,15 @@
 # Omega - Sigmascape V1.0 (Savage) - O5S
 
 hideall "--Reset--"
+hideall "--sync--"
 
 # Saintly Beam: 0 light appears, 5 target, 9 hit
 # Diabolic Light: 0 target appears, 8 target, 13 hit
 
 ##############################################################
 0 "--Reset--" sync /Removing combatant Phantom Train/ window 10000 jump 0
 
-0 "--Pull--"
+0 "--sync--" sync /:Engage!/ window 0,1
 12 "Ghost spawn"
 19 "Saintly Beam" duration 9
 31 "Diabolic Whistle (knockback)"