Can you look at the number of mechanics that happen in small raid sizes (10 or so) for the last boss?
Having 2 bombs in a 10 man raid is a pretty big deal compared to 2 in a 30man raid. Something like loot amount would work: 1 bomb for a 10 man is enough, 2 for 20, 3 for 30, with a chance to spawn another depending on the in-between amounts.
Also the absorb mechanic on phase 3. 1 is fine on 10 man but irrelevant in 30 man. When you watch a stream of people pugging it the player who gets it can just go die and it doesn’t matter. 2 happening at once would be better for 30 man.
Otherwise nice(ish) fight. Not the slogfest that was Ras.