The Martyr
The sample build is set up to have high survivability along with decent static damage. You have 2 encounter "resist 5 for a turn" powers to use to chase static modifiers, along with some equipment daily powers to do the same.
When you do get hit 3-4 times in a single round and are still standing, use the Bracers for two attacks, and follow it with Fury's Advance for a third. Then spend an action point, and talk your Warlord into giving you at least one more. 4 Attacks at +24-36 will really hurt something.
Try not to use this routine every round... you'll just go through surges too quickly. Use it for a couple of rounds, and use your minor action power, multi-attack powers, and action points on those rounds. Then hopefully jack your AC back up, and spend the rest of the fight being more conventional.
The background, a lot of late paragon feats and early epic feats are going to Sage of the Age's utility power, so that you can usually get 3-4 or the benefits. The ritual caster things are just tossed in there because it looks like it would work well with Sage of Ages and a silly high Arcana check.
Tavar, level 30
Deva, Avenger, Simbarch of Aglarond, Sage of Ages
Build: Isolating Avenger
Avenger's Censure: Censure of Retribution
Arcane Implement Proficiency: Arcane Implement Proficiency (heavy blade group)
Background: High Imaskar (High Imaskar Benefit)
FINAL ABILITY SCORES
Str 10, Con 15, Dex 12, Int 26, Wis 26, Cha 13.
STARTING ABILITY SCORES
Str 8, Con 13, Dex 10, Int 16, Wis 16, Cha 11.
DEFENSIVE STATS
AC: 47 Fort: 36 Reflex: 42 Will: 42
HP: 203 Surges: 11 Surge Value: 50
TRAINED SKILLS
Religion +41, Intimidate +22, Heal +29, Perception +29, Arcana +42, Nature +35
UNTRAINED SKILLS
Acrobatics +16, Bluff +16, Diplomacy +16, Dungeoneering +29, Endurance +17, History +35, Insight +23, Stealth +16, Streetwise +16, Thievery +16, Athletics +15
FEATS
Level 1: Power of Skill
Level 2: Weapon Proficiency (Fullblade)
Level 4: Focused Expertise (Fullblade)
Level 6: Divine Rage
Level 8: Arcane Initiate
Level 10: Arcane Implement Proficiency
Level 11: Improved Armor of Faith
Level 12: Battle Intuition
Level 14: Upright Revival
Level 16: Remembered Mother Tongue
Level 18: Auspicious Lineage
Level 20: Immortal Skill
Level 21: Ritual Caster
Level 22: Robust Defenses
Level 24: Skill Focus (Arcana)
Level 26: Skill Training (Nature)
Level 28: Epic Resurgence
Level 30: Fleet-Footed
POWERS
Arcane Initiate: Thunderwave
Avenger at-will 1: Overwhelming Strike
Avenger at-will 1: Bond of Retribution
Avenger encounter 1: Avenging Echo
Avenger daily 1: Aspect of Might
Avenger utility 2: Avenger's Resolve
Avenger encounter 3: Fury's Advance
Avenger daily 5: Menacing Presence
Avenger utility 6: Step of Fate
Avenger encounter 7: Splinter the Formation
Avenger daily 9: Holy Ardor
Avenger utility 10: Channel Endurance
Avenger encounter 13: Weaving Blades (replaces Avenging Echo)
Avenger daily 15: Temple of Brilliance (replaces Holy Ardor)
Avenger utility 16: Temple of Seclusion
Avenger encounter 17: Fury's Advance (replaces Fury's Advance)
Avenger daily 19: Blade of Astral Hosts (replaces Menacing Presence)
Avenger utility 22: Shield of Providence
Avenger encounter 23: Phase Duel (replaces Weaving Blades)
Avenger daily 25: Mantle of the Astral Champion (replaces Aspect of Might)
Avenger encounter 27: Scatter to the Astral Winds (replaces Splinter the Formation)
Avenger daily 29: Mantle of the Astral Champion (replaces Mantle of the Astral Champion)
ITEMS
Reckless Fullblade +6, Ghostphase Starweave Armor +6, Opal Ring of Remembrance (epic tier), Ritualist's Ring (epic tier), Scarab of Invulnerability +6, Ioun Stone of Regeneration (epic tier), Gauntlets of blinding strikes (paragon tier), Iron Armbands of Power (epic tier), Symbol of Victory +2, Zephyr Boots (epic tier), Ironskin Belt (paragon tier)