The mace blasts are not there to be the mainstay of a build. A Bane isn't a blaster. But they're not bad to have in your build. Sometimes you either can't reach, or don't want to get close to, a particular enemy, and being able to stand out of reach and peck at them is still pretty useful. It's nice to deal a parting shot or two to runners as well, and as Spellward says, slotting IO's.
Here's my prospective Bane build, optimized as I wanted to make him:
Villain Plan by Mids' Villain Designer 1.962
http://www.cohplanner.com/
Click this DataLink to open the build!
Bane Machine: Level 50 Natural Arachnos Soldier
Primary Power Set: Bane Spider Soldier
Secondary Power Set: Bane Spider Training
Power Pool: Flight
Power Pool: Fighting
Ancillary Pool: Mace Mastery
Villain Profile:
Level 1: Bash -- TchofDth-Acc/Dmg(A), TchofDth-Dmg/EndRdx(5), TchofDth-Dmg/Rchg(5), TchofDth-Acc/Dmg/EndRdx(7), TchofDth-Dmg/EndRdx/Rchg(7), TchofDth-Dam%(9)
Level 1: Bane Spider Armor Upgrade -- ResDam-I(A), ResDam-I(3), GldArm-3defTpProc(3)
Level 2: Mace Beam -- SprSpdBit-Acc/Dmg(A), SprSpdBit-Acc/Dmg/Rchg(17), SprSpdBit-Dmg/EndRdx/Rchg(19), SprSpdBit-Acc/Dmg/EndRdx/Rchg(19), SprSpdBit-Rchg/Global Toxic(34)
Level 4: Fly -- EndRdx-I(A)
Level 6: Hover -- DefBuff-I(A), DefBuff-I(17)
Level 8: Build Up -- RctRtc-Pcptn(A)
Level 10: Tactical Training: Maneuvers -- ShlWal-Def/EndRdx(A), ShlWal-Def/Rchg(11), ShlWal-EndRdx/Rchg(11), ShlWal-Def/EndRdx/Rchg(13), ShlWal-Def(13), ShlWal-ResDam/Re TP(15)
Level 12: Poisonous Ray -- SprDmnofA-Acc/Dmg(A), SprDmnofA-Acc/Dmg/Rchg(34), SprDmnofA-Dmg/EndRdx/Rchg(37), SprDmnofA-Acc/Dmg/EndRdx/Rchg(40), SprDmnofA-Rchg/DmgFear%(43)
Level 14: Pulverize -- Hct-Dmg(A), Hct-Dmg/Rchg(15), Hct-Acc/Dmg/Rchg(29), Hct-Acc/Rchg(34), Hct-Dmg/EndRdx(46), Hct-Dam%(48)
Level 16: Boxing -- Empty(A)
Level 18: Shatter -- SprBlsCol-Acc/Dmg(A), SprBlsCol-Dmg/EndRdx(45), SprBlsCol-Acc/Dmg/EndRdx(45), SprBlsCol-Acc/Dmg/Rchg(45), SprBlsCol-Dmg/EndRdx/Acc/Rchg(46), SprBlsCol-Rchg/HoldProc(46)
Level 20: Tactical Training: Leadership -- GssSynFr--ToHit(A), GssSynFr--ToHit/Rchg(21), GssSynFr--ToHit/Rchg/EndRdx(21), GssSynFr--Rchg/EndRdx(23), GssSynFr--ToHit/EndRdx(23), GssSynFr--Build%(25)
Level 22: Mental Training -- Flight-I(A)
Level 24: Cloaking Device -- DefBuff-I(A), DefBuff-I(25)
Level 26: Tough -- Ags-ResDam/EndRdx(A), Ags-ResDam/Rchg(27), Ags-EndRdx/Rchg(27), Ags-ResDam/EndRdx/Rchg(29), Ags-Psi/Status(33)
Level 28: Surveillance -- AnlWkn-%ToHit(A)
Level 30: Weave -- Rct-Def(A), Rct-Def/EndRdx(31), Rct-EndRdx/Rchg(31), Rct-Def/Rchg(31), Rct-Def/EndRdx/Rchg(33), Rct-ResDam%(33)
Level 32: Crowd Control -- Arm-Dmg(A), Arm-Dmg/Rchg(48), Arm-Acc/Dmg/Rchg(48), Arm-Acc/Rchg(50), Arm-Dmg/EndRdx(50), Arm-Dam%(50)
Level 35: Web Cocoon -- SprEnt-Acc/Hold(A), SprEnt-Hold/Rchg(36), SprEnt-End/Rchg(36), SprEnt-Acc/Hold/End(36), SprEnt-Acc/Hold/End/Rchg(37), SprEnt-Rchg/AbsorbProc(37)
Level 38: Mace Blast -- Apc-Dmg(A), Apc-Dmg/Rchg(39), Apc-Acc/Dmg/Rchg(39), Apc-Acc/Rchg(39), Apc-Dmg/EndRdx(40), Apc-Dam%(40)
Level 41: Web Envelope -- GrvAnc-Immob(A), GrvAnc-Immob/Rchg(42), GrvAnc-Acc/Immob/Rchg(42), GrvAnc-Immob/EndRdx(42), GrvAnc-Acc/Rchg(43), GrvAnc-Hold%(43)
Level 44: Tactical Training: Assault -- EndRdx-I(A)
Level 47: Wolf Spider Armor -- StdPrt-ResDam/Def+(A)
Level 49: Combat Training: Defensive -- Ksm-ToHit+(A)
Level 1: Brawl -- Empty(A)
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: Conditioning
Level 1: Sprint -- Empty(A)
Level 2: Rest -- RechRdx-I(A)
Level 4: Ninja Run
Level 2: Swift -- Flight-I(A)
Level 2: Health -- Mrc-Rcvry+(A)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- EndMod-I(A), EndMod-I(9)
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