I didn't chose it, you did. It's the only evil CR 12 dragon (at least in the Monster Manual). The others are CR 11 or 13. You said you wanted it to be against a CR 12 dragon. A Mature Adult White Dragon is clearly the most likely CR 12 dragon for anyone to fight.
I think maybe you would like to present in more detail the build, the spells learned, and round-by-round the tactics that you would think would give the adept a better chance than the monk.
All I did was go with an Adept who has Scorching Ray, Web, and Animate Dead. Adepts chose their spells like Clerics do. I figure since this is an Adept who's having fun with Animate Dead, I'd get Corpse Crafter as one of the feats, and of course he'd pump his Wis score. That's it though... all adepts could Web or Scorching Ray a dragon.
As for tactics... move in with the party, with the zombies on a constant order to stay within 30' of the adept, unless anyone in the party was attacked or attacked someone. In that case, attack whoever attacked/was attacked by the party. Stay behind the zombies to avoid the breath weapon (or behind obstacles) and fire Scorching Ray (remember, White Dragons have fire vulnerability), then use Web when you get a shot. The zombies will start chasing the dragon around when a party member attacks (or gets attacked).
Remember the dragon is slowed even if he makes his save. If he gets actually stuck, the zombies eat him. If not, he's slowed down for a bit and the zombies might still eat him. Either way, he's not flying away easily. Plus, if nothing else you've made it easier for the party to take the dragon down.
If the zombies get there, they can hit with a lot of attacks. They can also be ordered to grapple if needed. Also, weren't we talking about 9 headed hydras (since that's what was randomly found)? So that's 18 attacks between the two. Either way, it's some extra damage, so it helps. The dragon is being slowed (by webs) and hit for damage, keeping him away from squishier members of the party. That's a solid contribution, I'd say.
Not really sure. It was just a thought. Even a regular scorching ray does a bunch of damage. Maybe I'd just have lesser rods of extend, and use them on the webs to screw the dragon's attack vectors.
Fog cloud implies he's not moving around, but rather staying in the cloud. In that case, zombies are all over him. If he's flying about, webs and scorching rays are being shot at him. But I'm not planning to one shot TKO the dragon here, just help. Remember, if I do 1/4th his HP in a single round, the party is on track to kill him in that round. Certainly, the dragon can't just take that kind of abuse for long... he's losing 1/3 of his HP per round at that point. Also, spell resistance is pretty easy to deal with... I'd imagine I've got some kind of CL bumps here (How about a Bead of Karma used before the fight?).
So the adept with his zombies is in a party now? Well, in a party this looks already different. I daresay, though, that the zombies (from a long way alerting the dragon) and the close-range-only scorching ray are not exactly helping the party much.
Of course he's a in a party. We're talking about Tier comparisons... which means normal play. The question is if you're useful and can contribute. This isn't arena fighting. The zombies aren't going to alert the dragon any worse than any other tanky fighty type... even from 200' away the Dragon is unlikely to notice them, after all. But yes, the Adept functions as area denial, using Webs and Zombies to make areas the Dragon doesn't want to be in, and sometimes trapping him, while blasting him for over 1/3 his HPs with every shot.
I pretty much meant Polymorph, for the most part.
They are ground-bound. And once animated and the cost is paid for, the controlling limit means there are no zombie/skeleton fliers. Of course, appropriate flyers that can fight well are quite rare (which is why you picked a hydra to animate ).
I picked the hydras because in the random scenario, that's what I got. I really liked that Skeletal Storm Giant, but I didn't get him... he'd have range. After killing this dragon, you can bet I'd animate him, as he'd be perfect with his solid HD and flight.
It's your scenario... you picked attacking a CR 12 dragon. That pretty much means a Mature Adult White Dragon. And yeah, I think in his lair is the most common place to do this, but the description of White Dragons says they like staying near the ground and climbing around, so it's hardly a bit assumption that Web might be useful. It's not like he has long range attacks... he has to get close to attack too. As for the Zombies, they're useful, but they're only one of the Adept's spells after all. And let's be clear, if the Dragon tries to breathe on them once ever 1d4 rounds, he's dead. The Necrosis Carnex heals them rather rapidly, and they have a TON of hitpoints. And every time he gets in range to breathe, that's one more chance of getting webbed or Scorching Ray'd to death. So if the dragon does that, then they're doing an amazing job of taking fire from the Dragon without any drain on party resources.
There's no need really, because as we've seen every Adept has the spells to do this. Sure, you say Animate Dead and Polymorph are the single big spells... and yet Scorching Ray takes out 1/3 of the dragon's HP in a single hit (with no save, though SR applies). If the Adept did have a lesser metamagic rod of Maximize (not sure if he could afford that) then that's 2/3 with a single shot. And Web leaves the dragon in dire straights if it hits (and still slows him down a lot even if it doesn't).
The animated dragon would need to be one of HD 10 or lower for zombies and HD 20 for skeletal non-flying version (not possible to animate a bigger one). So this white dragon is out.
Nope. See Draconomicon. There's special rules for animating dragons. There's no HD limit. Also, a zombie dragon doesn't have double HD... instead it gets a whole bunch of bonus HP. It also keeps its BAB and saves, and has other special rules. So yeah, I get a crazy awesome zombie white dragon (and let go one of the hydras of course). For the record, here's what you get when you make a zombie mature adult white dragon with Corpse Crafter and the obvious Desecrate:
[spoiler]Zombie White Dragon (Undead)
Size Huge
Hit Dice 265 HP (21D12+129)
Str 31, Dex 12, Con -, Int -, Wis 10, Cha 6
BAB/Grapple +21/+39
Attack Bite +31 (2d8+10) (other natural weapons don't matter since bite is best and it can only do one at a time)
Special Attacks: Breath Weapon (3d6 Cold, DC 18 ref save), Crush (DC 18 ref, 2d8+15 + Pin), Frightful Presence (DC 18)
Special Qualities: Icewalking, Keen Senses, Spell Resistance 20, Undead Traits, Immune to Paralysis, Immune to Cold, Blindsense, DR 5/Slashing, Slow
Fort +12, Ref +13, Wil +13 (Immune to anything requiring a fort save that doesn't work on objects)
Speed 60ft, Burrow 30ft, Fly 200ft (clumsy), Swim 60ft
Initiative +2
AC 19 (-2 Size, +10 Natural, +1 Dex), Touch 9, Flat Foot 28
Skills: None
Feats: Toughness
If you want to check this, the example zombie dragon is in fact a zombie white dragon, though it doesn't have Corpsecrafter on it, and it's younger. Note that technically the zombie dragon can still partial action charge and full attack if it somehow got pounce, due to the wording of their version of the "slow" special quality (and note that the example zombie dragon does have a listed full attack).
He's great as a utility undead, since he's really good at detecting enemies and can go anywhere. I'd absolutely lose a zombie hydra for this guy! Sure, his offense isn't amazing, but he can crush people all over the place and his single attack does hit pretty hard. Also, any skeletons I raise are immune to his breath weapon, which could be handy. More importantly, I can then ride a zombie dragon around. Maybe I'd get a burrower's saddle (Races of Stone) and ride him underground too. That seems handy.[/spoiler]
Let us wait with the monk for now.
You know, you keep making claims and then not being able to back them up. You claimed your Monk was survivable, yet you claimed that these zombies were so fragile they'd die constantly. I've yet to see you show that your Monk was more durable than the zombies. I think it's high time you showed this. Would you like to show how he's more durable than the Zombie White Dragon, the Zombie Hydras, or the Skeletal Storm Giant?
No no, you were quite sure your skill monkey Monk was still a decent Monk. I'd like to see what it does. I did show how the Expert would handle this dragon too, after all. Surely your skill monkey Monk can do as well as an Expert in combat (since combat is more the Monk's specialty, and the Monk wasn't as good as the Expert in skills). Go on, show what you've got.
JaronK