EDIT:
Q200: Has anyone heard of/knows the source of a prestige class called something like Exterminus Arcanus... it sounds fake to me but one of my players claims it comes from Dragon Magazine but I never heard of it or anything with a similar name.
There is a 3.5 LN deity named Arcanus who was the original Spellsword. I think Extreminus is spelled wrong. I think it's supposed to be Extreminatus instead. It's a cleric or paladin (for bab) type of PrC as far as I know, but unless he's worshipping Arcanus, the answer should be a no regardless. He'd go up arcane levels, probably like a spellsword (which is what he should be taking anyways since that's what Arcanus is). I've heard of it, but can't recall where from.
Q 203: Is there an easy way to get +7 BAB and Caster Level 7 reasonably quickly without gestalt?
A 203 : Or play a Mystic Ranger.
Play a duskblade. Or cast Divine Power.
Good points. Just depends on whether you want to be a divine caster or arcane caster. As well, when you say CL 7, do you mean able to cast 4th level spells (which mystic rangers can't do at that level yet because they only have 5 lvls of spells), or just a basic CL 7? If you go with a Pathfinder Hexblade, Ranger, Paladin, or any other class that gives you full BAB but half caster level from 4th on, and add Practiced Spellcaster, you'll gain that back. The reason being that the Pathfinder versions make them CL -3 instead of CL 1/2.
Q 202 How is it possible for say a LE warforged barbarian, or a LN warlock, to still keep all of their abilities? Aren't barbarians "alignment: any chaotic"? I've been seeing this a few times in adventure write ups done by WotC (and we know they never screw up...) where the class the NPC has, does not fit the alignment that they should have, yet they still have all of their abilities.
Base classes aren't like PrCs, you still keep the powers when you fail to meet the prereqs. Some base classes have a special clause though, like paladin and monk.
Barbarians have that same clause. If they go lawful, they lose their rage and can not go up higher as a barbarian. Hence my confusion. As for the LN warlock, you're not even allowed to pick that at all. I could see LE or CN, but not LN.
Warlocks and Crusaders can, strangely enough, apparently still advance even after changing alignment to an ineligible one (there is no "ex-warlocks" or "Ex Crusaders" paragraph).
Fair enough. Still though, it says what they are. Or rather, what they SHOULD be. And if they're designed by WotC, they should know better.