Example cooldown timings for this boss, to use as MRT Notes or on the Healer Ramp Helper. Write your character's name and hit Copy to display the text.
230583 is a very static and very punishing boss. You can count on the exact same things happening at the exact same time every pull, and any mistake at all will murder you and possible the entire raid along with you
Your main concerns when it comes to healing the raid are 1217083 and 1216802. The mines from 1217083 will always come in sets of four explosions a few seconds apart, because doing it any other way means the whole raid blows up. This is a perfect setup for stasis and engulf as you can time the steps of the ramp with each bomb exploding: Ramp your echoes beforehand, when the first mine explodes, you ve the echoes and apply db, on the second mine you use the first engulf, and on the third you use the second engulf.
The stasis release might be useful either right then the final mine of each set triggers or a bit after depending on what mechanic comes next. Potentially a 1216802. Each time the raids swap colors they will take heavy damage, this isn't necessarily super dangerous by itself but over the course of the fight it will overlap closely with several other very dangerous mechanics that could very easily kill someone if they aren't healing from the swap damage quick
The phase transitions
At 2:05 and 4:33, after three sets of bombs, the boss will transition into phase two: This starts by knocking everyone really far back and proceeding to apply heavy healing absorbs on the whole raid via 1218319 repeatedly. While the phase itself doesn't do a lot of damage as most of the danger is concentrated in the healing absorb, people need to be healthy going into it as it is likely they will take some avoidable damage repositioning properly right after getting heavily displaced. After four waves of 1218319 the boss returns to the normal phase and you go back to healing mine explosions.