Verbal and Somatic are pretty self explanatory, but I just noticed a hiccup in Material and Divine Focus components, especially as spells are added to newer classes.
If a spell has DF, it requires a divine focus. Magic Weapon requires such, but is castable by a Wizard/Sorcerer. I also know the Witch gains a few spells that used to be divine only - presumably, at least one will have a DF requirement (though to be fair, I didn't look through them all). What is a Divine Focus for an arcane caster? Do they just ignore the DF requirement, or does it get replaced by a (negligible) M one?
Also, what about arcane spells by divine casters, such as domain spells or inquisitor/oracle spells that weren't divine before? Do divine casters need a spell component pouch, or do these get replaced by a divine focus? (I'm guessing they keep the M component - the Inquisitor spell Wrath is V, S, M but is only castable by them, not any arcane casters.)
Finally, what do Oracles (who may serve no gods or several) use as a divine focus? Any holy symbol they want?
An oracle can just use an item of great importance as a holy symbol,IIRC. Arcane casters don't have to worry about DF's
I'm not sure where it is (I'll give it a scan here in a second) but I think even with existing spells, it has been stated that only divine classes need divine foci, so if you are using the arcane version of the spell, you just ignore that requirement.
Last sentence under Spells: (page 43)
"Oracles do not need to provide a divine focus to cast spells that list divine focus (DF) as part of the components."