The build is designed to tank high reapers and raids. It takes advantage of the stacking defender enhancements from Paladin and Fighter, and splashes wizard for the AC boost. It is able to tank R10s and raids very very well.
14fighter/5pal/1wiz
Aasimar
Lawful Good
Unyielding Sentinel
420 AC
5000 HP
100-125 saves
17 str
9 Dex
18 con
14 int
10 Wis
8 Cha
Levels into Con
Skills
Intimidate
Balance
UMD
Spot
Heal
Feat list
Bond of the Protector
Heavy Armor Combatant
Dodge
Mobility
Fighter Past Life
Completionist
Two handed fighting
Improved two handed fighting
Greater two handed fighting
icrit Slash
Heavy Armor Master
Heavy Armor Champion
Extend Spell
PA
Cleave
Great Cleave
Blinding Speed
Elusive Target
Deific Warding
Perfect Two Weapon Fighting
Scion of Celestia
Enhancements
Sacred Defender
Holy Bastion
Sacred Defense
Durable Defense 3/3
Sacred Armor Mastery 3/3
Inciting Defense 3/3
Bulwark Aura 3/3
Sacred Shield Mastery 3/3
Hardy Defense 3/3
Constitution +1*2
Reinforced Armor 3/3
Swift Defense
Tenacious Defense 3/3
Reinforced Shield 3/3
Harbored by Light 3/3
Strong Defense 3/3
Stalwart Defender
Toughness
Stalwart Defensive Mastery 3/3
Threatening Countenance 3/3
Stalwart Shield Mastery 3/3
Armor Expertise 3/3
Shield Expertise 3/3
Constitution +1
Instinctive Defense 2/3
Reinforced Armor 3/3
Eldritch Knight
Eldritch Strike
Improved Mage Armor 3/3
Toughness 1/3
Aasimar
Stronger Bonds
Strength
Stronger Bonds
Strength
Stronger Bonds
Fight the Wicked*3
Blessings 1/3
Aasimar Improved Recovery*3
Celestial Tutelage: Bastard Sword
Ascendant Bond
Epic Destiny
Shield Prowess 3/3
Constitution+1*4
Legendary Shield Mastery 3/3
Block Energy 2/3
Strength of Vitality 3/3
Hardened 3/3
Undying Vanguard
Twists
Shiradi Energy Absorbtion
Magister Impregnable Mind
Draconic Dragonskin
Shadowdancer Lithe
LD Improved Combat Expertise
Gear
Legendary Barovian Plate
Terminus
Divinity with 3 piece Grandfather Shield 4 piece Nystuls Defense and double rubies of endless night
CC Protection Cha Insightful Cha ring
Ring of Power
Legendary Plateshard Belt
LGS Cloak ender
CC Natural Armor Dex Insightful Dex trinket
LGS necklace ender
LGS helm ender
Legendary Feargaze
Legendary Bracers of the Fallen Hero
LGS boots ender
LGS gloves ender
Have positive, negative, fire, acid, cold LGS ender. Have good luck, globe, draconic soul gem, resistance 8, insightful strength 2, armor mastery 2, false life 40, and vitality 20 slotted.