Balasan,

As a lore nerd, I have to say that I have no problem with killing him with 10 people. I've discussed that a bit in the article, but here's another thought.

By now, even a casual player's character is going to be powerful. Assuming they quested to level and didn't just sit and grind somewhere, by now now they have bought low dragons and elementals lords, saved whole kingdoms, and dismantled cults and conspiracies. They are acknowledged as among the most powerful heroes of the age by everyone from Khadgar and Mu'ru to Tyrande and Thrall. At this point, We, the PCs, aren't faceless footmen. We are the hero units of the game, just as Malfurion and Arthas and Illidan were of the last game.

Given this, it's no surprise that 10 of us could have the power to take down someone like Arthas. His power is probably mostly in his army anyway. Once we carve through that, we can face him one on one.

Besides, We will probably have some combination of Jaina Proudmoore, Sylvanas Windrunner, Tirion Fordring and Bolvar Fordragon assisting us, both in the 10 man and the 25 man, so if you prefer to have a "hero" present, there you go. I maintain that there ARE heroes present even without them though. Those heroes are the 10 or 25 Player Characters who have fought through Naxxramas, Wyrmrest, Zul'Drak, and likely 2 or 3 other citadels, before finally coming to the Icecrown Glacier to face down Arthas himself, the Lich King.