Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

Hello, I have a small question: What applies to Shapechange for AC? The calculations above indicate Tumble ranks and Dodge feat apply. What about Luck of Heroes and Armored Skin?

What about Luck of Heroes and Armored Skin?

Those two definitely do. There is a wiki entry that covers much of the details (though not all) here:
https://wiki.bgtscc.net/index.php?title=Polymorphing

I ran some simple experiments using a scroll of Polymorph bought from the High Hedge Wizard.

TL;DR: Currently, it seems that Tumble Ranks, Luck of Heroes and Armor Skin DO NOT apply.

Details:
1. Character has 20+ tumble ranks, Luck of Heroes and Armor Skin
2. Transform into a troll without gear. Listed AC: 20 (same as Troll base AC as listed in the Polymorph page, so none of the above apply)
3. Transform into a troll with +3 Deflection gear. Listed AC: 23

Tumble and LoH do apply, but the AC values in that green wiki table are not correct (or at least not clear). Here's a conversation I had on the subject that might help. Note especially Sun Wukong's list of form ACs. Hopefully the thread will help you get there faster than it took me...
viewtopic.php?f=64&t=65260

I'm going ahead to recreate the table in a non-Image file format, so it can can be wiki-adjusted with glee from now on...and includes the supposed REAL Base Armor stats for—at least—the shapes from the Shapechange spell.

Any more changes needed before I publish?

BTW...(do-me)' BBcode and tables ssssuuuuuucccccckkkkkkkk. Now I remember why I quit being a web person and started doing...other things.

Polymorph
Race	Focus	Offensive	Defense	Dmg	STR	CON	DEX	Base AC
Kobold	Weapon Enchantment carries over	Kukri,Sling	-	-	9	10	13	8
Goblin	Weapon Enchantment carries over	Rapier,Spear		-	11	12	13	8
Gnoll	Weapon Enchantment carries over	Halberd	-	-	15	13	10	8
Ore	Weapon Enchantment carries over	Longsword, Crossbow	-	-	17	12	11	7
Troglodyte	Weapon Enchantment carries over	Spear	-	-	10	14	9	10
Minotaur	Weapon Enchantment carries over	Greataxe	-	-	19	15	10	7
Troll	Regen	-	Regen	2d4	23	23	14	8
Ogre	Weapon Enchantment carries over	Warmace	-	-	21	15	8	7
Yeti	none	-		2d4	22	16	12	8
Gargoyle	none	-	-	2d4	15	18	14	7
Myconid	none	10% ConfusingAttack	-	2d6	14	15	12	6
Kenku	Weapon Enchantment carries over	Shortsword, Bow			16	14	16	4
Gloura	Weapon Enchantment carries over	Dagger	-	-	8	12	17	6
Drider	Weapon Enchantment carries over	Scythe, Crossbow,Longsword	-	-	15	16	15	6
Human	Weapon Enchantment carries over	Longsword	-	-	14	14	14	4
Elf	Weapon Enchantment carries over	Rapier	-	-	12	14	16	4
Drow	Weapon Enchantment carries over	Rapier	-	-	12	14	16	4
Duergar	Weapon Enchantment carries over	Greataxe	-	-	16	14	16	4
Dwarf	Weapon Enchantment carries over	Greataxe	-	-	16	14	16	4
Sahuagin	Weapon Enchantment carries over	Spear	-	-	14	12	13	5
Worg	none	Power Attack	-	2d4	17	15	15	6
Hook Horror	none	-	-	2d4	24	14	17	6
Shapechange
Race	Focus	Offensive	Defense	Dmg	STR	CON	DEX	Base AC
Fire Giant	Offense {Weapon)	Greatsword +5, Alch Silver	Fire Immunity	2d6+15	31	21	9	20
Frost Giant	Offense {Weapon)	Greataxe +5, Cold Iron, Vamp +2	Cold Immunity	1d12+13	29	21	9	18
Hill Giant	Offense {Weapon)	Greatclub +5, Alch Silver, Mass Crit, Daze on Hit		2d8+10	25	19	8	16
Maur	Offense {Weapon)	Greataxe +5, Cold Iron, Vamp +2		1d12+12	26	20	10
Werewolf Lord	Offense and Defense		10 / Silver	3d6+14	32	20	18	23
Iron Golem	Defense (Magic)	Haste	10 / Bludgeoning, Magic Immunity, Construct Traits	2d10+7	25	10	9	21
Mindflayer	Offense (Brains)	Attack +7, Kill on Hit (DC=14): Goblins, Ores, Monstrous, Reptilian	SR 34, Combat Expertise	1d8+5	16	16	14	21
Dragons	Defense (AC, Sneak)	Keen	Sneak Immunity, Elemental Immunity	2d6+12	33	21	10	26 (Mist Dragon 30)
Five-headed Hydra	Offense (Attacks)	Additonal Attacks	Regen 5	2d10+8	26	20	12	22
Skeleton	Offense and Defense	Scythe +5, Keen, Vamp +1	5/Bludgeoning, Undead Traits	2d4	18	10	18	23
Zombie	Defense (Immunities)	Strong Zombie Creep	5/Slashing, Undead Traits	1d8+1d6	18	10	16
Nightwalker	Defense (Immunities)	Vampiric Regeneration +1	10 / Silver, Undead Traits	2d6+14	38	10	14	24
Planetar	Offense (Weapon)	Greatsword +4, Alch Silver, Aligned	10/Chaotic, SR 30, Regen 2, Celestial Traits	2d6+1d4+4+10	25	10	19	19
Moon Dog	Defense (Spell Resistance, Evasion)	1d8 vs Evil, Ench +3	10/Evil, SR 34, Improved Evasion, Celestial Traits	3d6+1d8+3+7	24	16	13	19
Arboreal Elf	Offense (Ranged)	Bow +4, aligned, mighty 8	10/Lawful, Fey Traits	1d8+1d6+9+5	21	21	21	22
Marut	Offense and Defense	Aligned	10 / Chaotic, Regen 2, Construct Traits	2d6+1d8+12	35	10	13	20
Slaad, Death	Offense	Aligned, Stun on Hit, +1 AB, Slaad Eggs	10 / Lawful, Regen 3, Slaad Traits	3d6+10	21	21	23	24
Erinye	Offense (Ranged)	Bow +4, aligned, mighty 8	5 / Chaotic, Regen 1, Baatezu Traits	1d8+1d6+9+5	21	21	21	22
Horned Devil	Defense (AC)	Aligned	10 / Chaotic, Regen 3, Baatezu Traits	2d6+10	31	25	25	32
Palrethee	Offense and Defense	Greatsword +5, Alch Silver	10 / Lawful, Fire Shield 5, Tanari Traits	2d6+1d6+10+4	19	16	16	21
Hezrou	Offense and Defense	AB +3	10 / Lawful, Tanari Traits	3d6+4+5	21	29	10	18
Bebelith	Offense	Aligned, Bebilith Venom	10 I Lawful, Web Immunity	2d8+15	28	26	12	22