So I was wondering, can a Cleric take spell focus? It grants a bonus to a specific school, so say we get Animate Undead, does that qualify? Could I pick Necromancy, as a Cleric? The schools individually have a school, wizards just specialized based off of those schools so does that not imply that I could?
All spells belong to schools so any class can take the feat. Wizard spells are listed by schools because they are able to choose schools to focus on, and schools to prohibit. It makes things easier when it is time to choose and/or prepare spells.
If you look at any spells description, it will include what school it is a part of. This goes for the spells of any class.
The feat then works for any spell casting class. It really is just only good for one that is focusing on casting it's spells on the enemy (your party members don't try to resist buffs so it doesn't matter what the DC is).
The other big consideration for getting your DC up is if you are a full caster or not. If you are playing a class that only gets up to lvl 6 spells, it can be tough to get your DCs high enough to be reliable... not impossible, but you really need to focus.
In general whether or not to focus on spells that affect the enemy is a big question you should ask yourself when making a spellcaster, and if the answer is yes, regardless of class, you should be taking this feat... maybe even multiple times for different schools.
Sean
Thanks guys.