Why, Giacomo's style of course! Why did you think I meant intelligence?
Anyways, there's a few things that seem off.
First, though, you need to get your math right. Your build does not have AC 57, but AC 67.
Second, you forgot to include the stat gains for DEX (so, likely +10 and not +8) and strangely enough for a ridiculing AC optimization just took +5 Armor bonus bracers, not the +8 maximum – somewhat unusual for a level 20 character. So your build yields a solid AC 72. In core.
Giacomo, in his monk thread, made detailed calculations of his monk's AB, AC and etc. He showed himself willing to demonstrate how other posters who criticized him were wrong by running numbers against their numbers. This block is just a bunch of assertions with no calculation to back it up.
Not solid evidence, but it's a little different from what I remember.
Of course such an AC removes your build from usual melee concerns from the Balor and the Dragon which at level 15 sorcerer casting likely is a wyrm blue dragon (CR 23) or some such.
Now, here's another odd thing. Giacomo is well versed in core (or at least considers himself to be) so surely he would know that an Ancient Brass Dragon is a CR 20 monster that casts as a 15th level sorcerer. It's one of the results in the d20 SRD's monster search.
Again, this is could be explained in other ways, such as carelessness, but it doesn't make me feel confident in the poster's identity.
You could dare me to go through the math of it with you, but I caution you: do not go that road again. You lost so far every discussion with me that involved numerical evidence.
I don't think Giacomo would ever make such a statement, as every time we ran into each other previously, the argument went on until the thread got locked.
I suppose he might have considered himself the victor, but honestly it'd take a pretty vain person to think he won just because his opponent was unable to respond due to thread lockage. Giacomo might have thought himself to have had the stronger position in the argument, but it's pretty obvious that winning a war is not the same thing as having won a war. (See Nazis vs Russia for details)
A blasphemy (provided a balor faced by a bunch of adventurers is so stupid as to waste an action on this before ascertaining their power) when no bard is in the group to buff with inspire heroics can be taken care of with protections from sonic attacks – I leave it to your imagination as to what kind of protection for a level 20 character that can be.
In his monk guide, Giacomo pointed out the specific items his monk would have to counter various challenges. The fact that he does not include anything of the sort this time strikes me as unusual. Even a simple mention of earplugs would have been nice.
The poster also thinks a Balor would be stupid to use Blasphemy before ascertaining the enemy's power. However, Blasphemy can in fact be used to determine what level the enemy is, as its effects are based off of the victim's hit dice. By observing its effects on the targets, an estimation of their levels can be made. Giacomo has proven himself familiar with Blasphemy in the past, so there is really no excuse for this statement.
It also goes without saying that a dragon’s blindsense limited to 60ft will detect absolutely nothing against a foe that can charge from hiding from much further away. Furthermore, its spellcasting arsenal limited to level 1-7 spells are fairly laughable against a level 20 character with such saves and stealth skills (and own wbl with the UMD you mentioned to fill the remaining spell vulnerarbilities besides; the ability to turn invisible hardly matters at all at these levels when see invisibility can be obtained so easily with items).
Giacomo is familiar with no-save spells from 1-7 that would stand a good chance of being problematic for a level 20 melee character, such as Solid Fog, Sleet Storm, Wall of Force, Power Word Blind, Contingency, Limited Wish, Waves of Exhaustion, Reverse Gravity, Grasping Hand, and so on.
Finally, the tarrasque. Now that’s a monster which is a whole can of worms as far as I am concerned. Possibly quite easy when players recite its MM entry by heart and then look as to what rules gaps to exploit. But in actual play without metagaming? A headache for all kinds of core builds.
I'm pretty sure Giacomo knows of the Reverse Gravity + Gate trick, and the closely related Time Stop + PAO ground into air + Gate trick, both of which send the Tarrasque to another plane of existence, which makes this statement baffling.
Altogether, a robust double-fail on your side, Solo – the first for failing to do a correct parody and the second for showing a profound lack of knowledge of the true power of your build following (albeit only part) of my famous monk guide …
Out of everything in that post, this is what makes me doubt him the most. Giacomo tended to be good natured (or at least he pretended to be) and could be quite passive aggressive, but never openly mocked or insulted people. Perhaps this was for fear of the moderators at GitP, but he behaved the same way when I had a run in with him on Gleemax. He would never say something like this.
Now, it's possible that I am wrong. Giacomo could have grown lazy, forgotten the rules of the game, and become a troll, but his personality remained consistent enough through the years I was on GitP that I'd doubt it.
In conclusion, sir, I say that it is you who fails, for you fail at pretending to be Giacomo.