There are two different options for the new WoW Dragonflight Raid Aberrus. Either with a group size of 14 players (2 tanks, 3 healers, 9 DD's) or of 16 players (2 tanks, 4 healers, 10 DD's). Larger groups of 30 players or even more, should only be led by experienced players. The larger the groups, the greater the chance that the entire raid group can die because of one player's mistake. So if you want to get the new raid done quickly, it's best to look for smaller groups.