Why do the World of Warcraft National Service 3.22 combat thieves pile up armor? Isn't there anything else that can improve DPS?

Armor piercing is the armor that reduces the target percentage, and armor itself is used to weaken physical damage. Therefore, high armor-piercing projectile can make you reduce the damage caused by the target as much as possible, thus changing the direction and improving DPS. As far as function is concerned, the income of armor-piercing projectile is greater than crit and quickness, but only when armor-piercing projectile reaches a relatively high value can the income be maximized. At present, the armor-piercing provided by the equipment is obviously low, so it is impossible to achieve full armor-piercing if the armor-piercing flow is pursued (that is, it is ignored). It is suggested to soften the armor-piercing route, that is, to achieve full armor-piercing through the trigger effect of ornaments. There are two such ornaments, 25 Kel 'Thuzad's Death Bell and H Torom's Thor, both of which can trigger 600+ sunder armor. In addition, this version is a good choice to pile up armor with a hammer. The talent of hammer is equivalent to 2 10 sunder armor, which is very impressive. However, if it is fragile and broken, it cannot be close to integrity. It is recommended not to accumulate without brains, or to focus on sensitive violence. These are thieves. For an assassin, don't break armor at all, because assassination depends on poison to improve DPS, and breaking armor is ineffective for poison, so the most important thing for an assassin is to attack, and attack quickly. This version of the battle is not as powerful as assassination. You can't beat 4200 thieves. Maybe he was assassinated, or there is something wrong with your distribution, for many reasons.