Nail said:
Would ya look at that.....huh.
Still, CR 20 is close, I'd guess. Those 11 levels of cleric allows for buffs (that are easily dispelled) and heals (which is most of the time a lost action, given the PCs damage-dealing abilities.) It's worth a +5 bump to CR, given the HD, hp, feats, and saves, though.
Playtest, anyone?
Alright, I'll bite. To keep it fair, I'm going to use the critter as written in the MM, which means we keep such "winner" feats as Iron Will (+28 wasn't enough?) and the listed spell list.
I have two groups at this level range. First, a Barbarian/Paladin of Freedom, a Wizard/Incantatrix, and an Azer Cleric They are level 19 and 20. If they choose to expend valuable spell resources (well over the 25% for an on-CR critter), they pretty much automatically win. Mr. Giant loses over half his HP in the first round and has to use Heal on himself and use Quickened Dimension Door to flee the barbarian's full attack. Then the same thing happens again, but the Giant is out of Heal. Fortunately for the giant, the party is running out of top guns, so if it flees again with Quickened Dimension Door, it can do one smack-down round and even live against the reprisal. Then it dies on the fourth round, or sometimes the fifth depending on luck. This is fighting against a relatively simplistic attack from the PCs where they just keep charging the Confessor and letting him full attack and flee like he wants.
Group 2 is a bit more interesting. They are lower in level (16-17), but they have a Fighter/Monk/Iajutsu Master, a Monk/Ninja/Shou Disciple with a ton of attacks, a rather worthless Paladin of Freedom/Spymaster, an NPC Arcane Trickster who is rather weak, an NPC Marshal, and a Swordsage who can only do ice versions of Desert Wind manoeuvres. The Iajutsu Master can unleash incredible devastation on the Confessor, such that a Heal is again necessary, but he can't do it again for that encounter. The Monk/Ninja is hosed if he can't get a full attack, since he relies on many attacks, but his AC is high enough that the Confessor can't just Power Attack with abandon like against the Barbarian of the other group. The Marshal just gives the aura, and the Paladin of Freedom and Arcane Trickster do basically nothing. (except the latter easily dispels all buffs if there were any and provides minor Sneak Attack spells if allowed to set up with Improved Invisibility) The Swordsage provides some fairly powerful attacks, and unlike the Monk/Ninja/Shou Disciple, he has a manoeuvre that will let him close with the Dimension Dooring Confessor for a full attack. Of course, the Swordsage isn't so safe from the Giant's attacks either. In the end, if the Confessor is forced to trade single attacks with the Monk/Ninja/Shou Disciple (after running out of Quickened D-Doors) while taking pot-shots from the Arcane Trickster, he will lose. If he stands to full attack, he dies more quickly. Frankly, the main thing keeping the giant alive at all is a combination of those massive HPs and the Heal spell.