The reason why he asked for a physical damage team and not magic damage players was because Azure Dragon Azuregos did not take magic damage. The Gnomish Poultryizer was not considered a magical item. The way it worked was very complicated and couldn't be understood with reason.
However, things were a little awkward for melee players who dealt physical damage. The size of the Boss wasn't that large and there was no unit collision. As such, there was a limit as to how many players could attack the Boss at once.
What was even more problematic was the Gnomish Poultryizer.
It could turn the Boss into a chicken, which meant that it would shrink significantly.
In addition to the two Main Tanks, the most players they could bring along was only 16. However, to ensure that they could achieve adequate levels of Skill Completion, twelve melee players was the optimal number.
Lu Li asked Square Root 3 for 40 melee players, 20 Druids who had Resurrect and almost one Healer per player.