Here's slightly changed version of a build Justaris posted earlier this month. I swapped around a few slots here and there and picked up SJ to add Blessing of the Zephyr KB protection (12 points now). The core of Justaris's build makes good use of limited slots to hit all the resistance and defense targets. You might be able sneak in an ATO set somewhere but I don't think you'll see a huge benefit compared to what's there now.
Hero Plan by Mids' Reborn : Hero Designer 2.6.0.1 https://github.com/ImaginaryDevelopment/imaginary-hero-designer
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Inkfathom: Level 50 Natural Tanker Primary Power Set: Dark Armor Secondary Power Set: Staff Fighting Power Pool: Fighting Power Pool: Speed Power Pool: Leadership Power Pool: Leaping
Hero Profile: Level 1: Dark Embrace -- RctArm-ResDam/EndRdx(A), RctArm-ResDam(13), RctArm-EndRdx(13), RctArm-ResDam/EndRdx/Rchg(15), StdPrt-ResDam/Def+(15), GldArm-3defTpProc(17) Level 1: Mercurial Blow -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx(3), KntCmb-Dmg/Rchg(3), KntCmb-Dmg/EndRdx/Rchg(5) Level 2: Murky Cloud -- RctArm-ResDam/EndRdx(A), RctArm-ResDam/EndRdx/Rchg(7), RctArm-ResDam(17), RctArm-EndRdx(19), StdPrt-ResKB(19) Level 4: Guarded Spin -- Erd-Acc/Dmg/Rchg(A), Erd-Dmg/Rchg(5), Erd-Dmg(7) Level 6: Obsidian Shield -- RctArm-ResDam/EndRdx(A), RctArm-ResDam(9), RctArm-EndRdx(9), RctArm-ResDam/EndRdx/Rchg(11), UnbGrd-Max HP%(11) Level 8: Dark Regeneration -- ThfofEss-+End%(A), DctWnd-EndRdx/Rchg(21), TchoftheN-Acc/EndRdx/Rchg(23), PrfZng-Acc/Rchg(25) Level 10: Kick -- FrcFdb-Rechg%(A) Level 12: Cloak of Darkness -- LucoftheG-Def/Rchg+(A), LucoftheG-Def(27), LucoftheG-Def/EndRdx(27), Krm-ResKB(29), Rct-ResDam%(36) Level 14: Tough -- RctArm-ResDam/EndRdx(A), RctArm-ResDam(29), RctArm-EndRdx(31), RctArm-ResDam/EndRdx/Rchg(31), ImpSki-Status(31) Level 16: Eye of the Storm -- Erd-Dmg(A), Erd-Dmg/Rchg(21), Erd-Acc/Dmg/Rchg(33) Level 18: Cloak of Fear -- DarWtcDsp-ToHitDeb/EndRdx(A) Level 20: Staff Mastery Level 22: Weave -- LucoftheG-Def/EndRdx(A), ShlWal-ResDam/Re TP(23), LucoftheG-Def/Rchg+(34), LucoftheG-Def(34) Level 24: Death Shroud -- Erd-Dmg(A), Erd-%Dam(25), Erd-Acc/Dmg/EndRdx/Rchg(36), OvrFrc-Dam/KB(37) Level 26: Precise Strike -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx/Rchg(36), KntCmb-Dmg/EndRdx(46), KntCmb-Dmg/Rchg(48) Level 28: Taunt -- MckBrt-Taunt(A), MckBrt-Rchg(33), MckBrt-Taunt/Rchg/Rng(33), MckBrt-Acc/Rchg(34), MckBrt-Taunt/Rng(37) Level 30: Serpent's Reach -- SprWntBit-Acc/Dmg(A), SprWntBit-Dmg/Rchg(37), SprWntBit-Acc/Dmg/EndRdx(39), SprWntBit-Acc/Dmg/Rchg(43), SprWntBit-Dmg/EndRdx/Acc/Rchg(43), SprWntBit-Rchg/SlowProc(50) Level 32: Hasten -- RechRdx-I(A), RechRdx-I(48) Level 35: Innocuous Strikes -- SprAvl-Acc/Dmg(A), SprAvl-Dmg/EndRdx(42), SprAvl-Acc/Dmg/EndRdx(42), SprAvl-Acc/Dmg/Rchg(43), SprAvl-Acc/Dmg/EndRdx/Rchg(45), SprAvl-Rchg/KDProc(45) Level 38: Sky Splitter -- SprBlsCol-Acc/Dmg(A), SprBlsCol-Dmg/EndRdx(39), SprBlsCol-Acc/Dmg/EndRdx(40), SprBlsCol-Acc/Dmg/Rchg(40), SprBlsCol-Dmg/EndRdx/Acc/Rchg(40), SprBlsCol-Rchg/HoldProc(42) Level 41: Soul Transfer -- AbsAmz-Stun/Rchg(A) Level 44: Maneuvers -- LucoftheG-Def/EndRdx(A), LucoftheG-Def/Rchg+(48) Level 47: Combat Jumping -- LucoftheG-Def(A), LucoftheG-Def/Rchg+(50) Level 49: Super Jump -- BlsoftheZ-ResKB(A) Level 1: Brawl -- Empty(A) Level 1: Gauntlet Level 1: Prestige Power Dash -- Empty(A) Level 1: Prestige Power Slide -- Empty(A) Level 1: Prestige Power Quick -- Empty(A) Level 1: Prestige Power Rush -- Empty(A) Level 1: Prestige Power Surge -- Empty(A) Level 1: Sprint -- Empty(A) Level 2: Rest -- Empty(A) Level 4: Ninja Run Level 2: Swift -- Run-I(A) Level 2: Health -- Pnc-Heal/+End(A), NmnCnv-Regen/Rcvry+(39), Mrc-Rcvry+(46), Prv-Absorb%(50) Level 2: Hurdle -- Jump-I(A) Level 2: Stamina -- EndMod-I(A), EndMod-I(45), PrfShf-End%(46) Level 1: Combo Level 1 Level 1: Combo Level 2 Level 1: Combo Level 3 Level 20: Form of the Body Level 20: Form of the Mind Level 20: Form of the Soul Level 50: Cardiac Core Paragon ------------