Re: A 157
"Can" implies an option, not a mandate. Exotic Weapon Proficiency (bastard sword) will allow wielding that weapon with either one or two hands without incurring nonproficiency penalties, despite the lack of martial weapon proficiency for that type of weapon.A bastard sword is too large to use in one hand without special training; thus, it is an exotic weapon. A character can use a bastard sword two-handed as a martial weapon.
A 158 Ask your DM.
Contingency doesn't give a lot of guidance for acceptable triggers.Some DMs will refuse to allow game mechanic triggers like rolling initiative, and will limit you to character-observable events such as injury or a successful Spot check.The conditions needed to bring the spell into effect must be clear, although they can be general.