Nullsig's page

This is an odd scenario that popped up yesterday.

Calm talks with the BBEG are going on and Player 1 fails a bluff check creating suspicion. BBEG readies action to cast hold person if Player 1 does anything provocative (still out of combat).

Player 1 begins casting (spell is irrelevant at this point but it was create pit). BBEG casts Hold Person as a counter. Player fails will save and uses immediate action to cast Emergency Force Sphere.

My questions about this are:
1. Since he failed the will wouldn't that have prevented his ability to do the Immediate Action?

2. Can you use an immediate action in this way since he was already focused on casting a different spell?

3. What exactly should/would have transpired in this situation?

I have been looking around just to make sure that this is the case but....

If I take the Aasimar Oracle favored class bonus that gives me +1/2 to the class level for a specific revelation and apply that to the Lunar Oracle's Primal Companion. Does anything in the rules prevent that companion from being considered above my level?

In this case if I take the favored class bonus for level 1 and 2 then my primal companion "should" be considered level 3 as per the animal companion chart. At level 4 it would be 6, at 6 it would be 9 and so on.

I have been searching around for an answer to questions on a build

I am working on a build for a character that uses:

7 Two-Handed Fighter
2 Urban Barbarian
4 Internal Alchemist, Vivisectionist

First off is this build PFS Legal. My only real concern is that the two Alchemist Archetypes may not be usable together.

Second as I will eventually have 4 arms... Would I be able to dual wield Great Swords using Two-Weapon Fighting Feats?

Lastly would these feats work with the Two-Handed Fighter abilities like Back Swing?