Actually, I just checked one of the used damage spells and there seems to be a BIG dmg error.
I didnt know the spell so I believed my wiz when he told me the dmg: which was around 360 for both arrows together.
And I just cant see a way how you could reach that dmg with a Lv2 spell.
So either I am badly mistaken on something here or the boss escaped and is hiding in his cave, waiting for our 2 blade barriers to run off.
HAHAHAHAHAHAHAHAHA!!! You got Snow Job!
Here...
- PLAYER’S HANDBOOK (3.0)
- PLAYER’S HANDBOOK 1 (3.5)
Conjuration (Creation) [Acid]
Level: Duskblade 2, Slime Domain 2, Sorcerer/Wizard 2, Warmage 2
Components: V, S, M, F
Casting Time: 1 standard action
Range: Long (400 ft. + 40 ft./level)
Effect: One arrow of acid
Duration: 1 round + 1 round per three levels
Saving Throw: None
Spell Resistance: No
A magical arrow of acid springs from your hand and speeds to its target. You must succeed on a ranged touch attack to hit your target. The arrow deals 2d4 points of acid damage with no splash damage. For every three caster levels (to a maximum of 18th), the acid, unless somehow neutralized, lasts for another round, dealing another 2d4 points of damage in that round.
Material Component: Powdered rhubarb leaf and an adder’s stomach.
Focus: A dart.
Alternate Material Componate: Four masterwork darts [Empowered] (1,200 gp)
Editor (Blaster): DoT SUCKS. I do not like this spell, no it doesn’t give a save or SR, but it is a single threat blast that does unimpressive damage extended out over rounds. Even a 5 acid resistance makes this spell completely worthless.
Okay, so, your BBEG didn't have any energy resistance, eh? Poor planning on his part, I'll say. But lets do the math.
Melfs acid arrow. LV13 Wiz.
Max.+Emp.
Okay, so he's casting a 7th level spell. It does 12 a round acid damage for 5 rounds.
Acid is a form of energy damage, and most spells with this descriptor deal acid damage. As you'd expect, acid immunity makes the spell's recipient immune to acid damage from the spell. Acid resistance reduces acid damage from the spell. Hardness applies to acid attacks. Acid attacks deal normal damage both to creatures and to objects, and thus deal normal damage to an animated object (less the effect of the hardness).
See the bold part? It applies to damage reduction because it's normal damage. Acid and sonic damage are both nerfed. Cold, Fire, and Electrical aren't "normal" damage, thus they bypass damage reduction, but acid? Well, if your BBEG didn't have at least 5/good DR, then why is he so big and bad?
Combine that with a simple 5 energy resistance to acid which anyone can pick up for a pittance. Said 7th level spell should have fizzled. MAYBE 2 pts a round for 5 rounds. 12,500 gp gets you Energy resistance to everything at 5. I think 5/Good DR goes standard for the BBEG template. Poor planning on BBEG's plan indeed.
Now, let's look at the part where you say he did 360 points of damage. HOW? 60 points max a spell. that's 5 melfs acid arrows he has to be hit with. At one a round that's: 12, 24, 36, 48, 60, 48, 36, 24, 12. Should be more then enough time for him to heal himself or something. Side Note: You know each spell would be applied against his defenses seperately, Right?
But lets look at "unless somehow neutralized" part of the spell. Guess what neutralizes acid? A simple 0-level spell called create water. Sploosh. This BBEG doesn't have some low level cleric to his BBE God who can cast a cantrip? We're talking 4th level acolyte here. A nobody. How about he just bashes the roof of the cave and showers himself with dirt, taking a full round to rub it off? How about he strips naked, showing off his huge BBE Wang in the process. Huge BBE wangs worked in "This Is The End", it can work for you.
The trick to a good BBEG is to make the fight epic. You do this with a smattering of defenses to stop cheap shots, yet allow huge power wallops to get through. Nobody likes a climatic fight scene where the BBEG dies from what amounts to green, sizzling, paper cuts.