What this means is you can now get Herald of the Titans in a group that is larger than 10 players as long as all players meet the requirements. However, because the two raid difficulties were merged, the lockout for Ulduar (Normal) now functions the same as current content normal raids. In short, what all this information means is gearing for Herald is now a lot more difficult as you are having to compete with two boss tables instead of one. Algalon now 7.17m health in a base 10p setting). Bosses and trash mobs have also received increases to their hp values (i.e. Successfully completing a boss's 'hardmode' now rewards an extra cache of gear that contains 1 piece of hardmode gear from either 10p or 25p. Theres also a detailed breakdown of recommended talents and legendaries for each fight in the Boss Guides.
Boss loot tables from both 10p and 25p have been merged into a single loot table (Please note: How much loot you get from each difficulty is completely random meaning you can do a boss and get loot all from 25p, loot all from 10p, or a mixture of the two). With the release of patch 7.3.5, Ulduar has received changes in the following ways: Ulduar 10p and 25p and have been consolidated into a single difficulty called Ulduar (Normal).
