Inv/DB build help

[Agorazium]

First time playing a tanker past the early levels and I have no idea what I'm doing with the build! I took what I could find from the forums but I'm sure there's room for improvement.

 

I hear a lot of conflicting advice on /DB and whether or not one should take all the attacks and focus on combos. I found I do not like the combo system, mostly due to the accuracy checks ruining them often, so I simply went with an attack chain that feels good to me and has a lot of space for procs.

 

My main questions are whether or not I'm slotting the primary powers correctly and what to do with my empty power slots. I hit capped S/L resist and def (with 2 enemies) without Tough/Weave and given the lack of +recovery set bonuses I hesitate to take those. Are the Leadership or Medicine pools worth it on a tank? Also I know Combat Jumping is better but Hover is necessary for theme.

 

Hero Plan by Mids' Reborn : Hero Designer 2.7.2.10
https://github.com/Crytilis/mids-reborn-hero-designer

Click this DataLink to open the build!

Level 50 Mutation Tanker
Primary Power Set: Invulnerability
Secondary Power Set: Dual Blades
Power Pool: Flight
Ancillary Pool: Pyre Mastery

Hero Profile:
Level 1: Temp Invulnerability -- UnbGrd-ResDam(A), UnbGrd-ResDam/EndRdx(7), UnbGrd-Rchg/ResDam(7), UnbGrd-ResDam/EndRdx/Rchg(9)
Level 1: Nimble Slash -- Empty(A)
Level 2: Dull Pain -- Prv-Heal(A), Prv-Heal/Rchg(9), Prv-Heal/Rchg/EndRdx(11)
Level 4: Ablating Strike -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx(11), KntCmb-Dmg/Rchg(13), KntCmb-Dmg/EndRdx/Rchg(13), TchofLadG-%Dam(15), AchHee-ResDeb%(15)
Level 6: Hover -- LucoftheG-Def/Rchg+(A), BlsoftheZ-Travel(17), BlsoftheZ-Travel/EndRdx(17)
Level 8: Unyielding -- Ags-ResDam(A), Ags-ResDam/EndRdx(19), Ags-ResDam/Rchg(19), Ags-Psi/Status(21)
Level 10: Taunt -- PrfZng-Dam%(A)
Level 12: Fly -- Empty(A)
Level 14: Resist Energies -- UnbGrd-Max HP%(A)
Level 16: Typhoon's Edge -- Obl-Dmg(A), Obl-Acc/Rchg(37), Obl-Dmg/Rchg(39), Obl-Acc/Dmg/Rchg(39), Obl-Acc/Dmg/EndRdx/Rchg(39), Obl-%Dam(40)
Level 18: Invincibility -- LucoftheG-Def/Rchg+(A), LucoftheG-Def(21), LucoftheG-Def/EndRdx(23), LucoftheG-Def/Rchg(23), LucoftheG-Def/EndRdx/Rchg(25)
Level 20: Blinding Feint -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx(25), KntCmb-Dmg/Rchg(27), KntCmb-Dmg/EndRdx/Rchg(27), GssSynFr--Build%(29), TchofDth-Dam%(29)
Level 22: Resist Elements -- GldArm-3defTpProc(A)
Level 24: Resist Physical Damage -- StdPrt-ResDam/Def+(A)
Level 26: Tough Hide -- LucoftheG-Def/Rchg+(A), LucoftheG-Def(31), LucoftheG-Def/EndRdx(31), LucoftheG-Def/Rchg(31), LucoftheG-Def/EndRdx/Rchg(34)
Level 28: Vengeful Slice -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx(33), KntCmb-Dmg/Rchg(33), KntCmb-Dmg/EndRdx/Rchg(33), TchofDth-Dam%(34), FrcFdb-Rechg%(34)
Level 30: [Empty] 
Level 32: [Empty] 
Level 35: Sweeping Strike -- Obl-Dmg(A), Obl-Acc/Rchg(36), Obl-Dmg/Rchg(36), Obl-Acc/Dmg/Rchg(36), Obl-Acc/Dmg/EndRdx/Rchg(37), Obl-%Dam(37)
Level 38: One Thousand Cuts -- SprMghoft-Acc/Dmg(A), SprMghoft-Dmg/Rchg(40), SprMghoft-Acc/Dmg/Rchg(40), SprMghoft-Dmg/EndRdx/Rchg(42), SprMghoft-Acc/Dmg/EndRdx/Rchg(42), SprMghoft-Rchg/Res%(42)
Level 41: Char -- Thn-Acc/Dmg(A), Thn-Dmg/EndRdx(43), Thn-Acc/Dmg/EndRdx(43), GhsWdwEmb-Dam%(43)
Level 44: Melt Armor -- AnlWkn-Acc/DefDeb(A), AnlWkn-DefDeb/EndRdx/Rchg(45), AnlWkn-Acc/Rchg/EndRdx(45), AnlWkn-Acc/Rchg(45)
Level 47: Fire Ball -- PstBls-Acc/Dmg(A), PstBls-Dmg/EndRdx(48), PstBls-Dmg/Rchg(48), PstBls-Acc/Dmg/EndRdx(48), PstBls-Dam%(50)
Level 49: [Empty] 
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 -- Empty(A)
Level 2: Health -- Mrc-Rcvry+(A), Pnc-Heal/+End(3), NmnCnv-Regen/Rcvry+(3)
Level 2: Hurdle -- Empty(A)
Level 2: Stamina -- PrfShf-End%(A), PrfShf-EndMod(5), PrfShf-EndMod/Rchg(5)
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