1的话一般DM不会反对, 不过要注意你的动作伙伴可没有"动作伙伴职业特性", 不能用点专长的方式习得这个专长
2怪物坐骑合并所有等级, 你怎样得出分裂的推測呢?
4多重攻擊(Multiattack, Ex):如果動物夥伴有三次或更多的天生攻擊能力,而且之前沒有此專長,那麼它將獲得「多重攻擊」作為獎勵專長。如果其天生武器攻擊不到三次,則其一種主要天生武器可攻擊第二次,但受-5減值。
Multiattack: An animal companion gains Multiattack as a bonus feat if it has three or more natural attacks and does not already have that feat. If it does not have the requisite three or more natural attacks, the animal companion instead gains a second attack with one of its natural weapons, albeit at a –5 penalty.
跟次要天武没有任何关系吧?