关于1.10 "oskill"（你的cta为什么只有+3bo？）
现象：一个x/6/x的call to arms，battle order在bar看起来，只有3bo，而其他角色看起来是6bo。甚至，bar拿两把cta也只能+3bo，+2 all skill。
或者，110新增的有+3-5ga的unique bow，即使是+5ga，ama看起来都只有+3ga。
原因：暴雪为了保持角色和item之间的平衡，设定了一个叫"oskill"的东西，其实就是own skill。
就是说，对于任何角色都可以使用的技能加成，本身拥有这个技能的char将最高只能获得+3的技能加成。
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暴雪原话：
oskills work differently for classes that "own" that skill
This is all intentional, in order to balance these items.
Skill Points that work for Any Class ("oskill" Skill Points)
The Trang-Oul's Avatar Set gives +18 to Fireball and +13 to Fire Wall. The boost to fireball (as well as Frostwind's arctic blast bonus and a whole lot of other items) are examples of what's internally known as an "oskill". These are skill bonuses that work for any class. If a Necromancer is wearing a Trang-Oul set, he'll get +18 fireball and any +X To All Skills equipment can further increase this. The same applies to all other non-sorceress class wearing a part of that set.
However, oskills work differently for classes that "own" that skill. In this case, it's a Sorceress getting a bonus to Fireball. In the other case, it was a Druid getting a bonus to Arctic Blast. If a character gets an oskill bonus to a skill that class "owns," the bonus is restricted to a maximum of +3. If a Barbarian is dual-wielding Call to Arms runeword weapons, the +3 cap is applied to the total from both weapons. This is all intentional, in order to balance these items.
