your stats are just a little off, JmT
Animals have a Base Attack Bonus equal to a cleric and Fort and Refl saves are both usually 'good' (base saves Fort +2, Refl +2, Will +0,)
so the changes to the rockhopper would be:
saves: Fort +2, (base +2, +0 Con)
---------Refl +4, (base +2, +2 Dex)
---------Will +1 (Base +0, +1 Wis)
Attack Bonus: +0 base, +1 size, +2 weapon finesse = +3
the Emperor
saves: Fort +5, (base +3, +2 Con)
---------Ref +5, (base +3, +2 dex)
---------Will +1 (base +0, +1 Wis)
Attack Bonus: +1 base, +0 size, +2 weapon finesse = +3
i'm pretty sure that's right...
