Fire Blast / Martial Combat question on Throw Sand

[IneptAdept]

Just curious whether throw sand is worth taking.  I am having fun at lvl 33 with ranged attacks then melee (after tank/brute gets alpha first).  Looking for opinions.  Here is my build in case you have other suggestions as well.  Thank you.

 

Hero Plan by Mids' Hero Designer 1.962
http://www.cohplanner.com/

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Savita Tariqah: Level 50 Magic Blaster
Primary Power Set: Fire Blast
Secondary Power Set: Martial Combat
Power Pool: Leaping
Power Pool: Fighting
Power Pool: Speed
Ancillary Pool: Flame Mastery

Hero Profile:
Level 1: Fire Blast -- Thn-Acc/Dmg(A), Thn-Acc/Dmg/Rchg(3), Thn-Acc/Dmg/EndRdx(5), Thn-Dmg/EndRdx/Rchg(15)
Level 1: Ki Push -- Acc-I(A)
Level 2: Fire Ball -- PstBls-Acc/Dmg(A), PstBls-Dmg/EndRdx(3), PstBls-Dmg/Rng(5), PstBls-Dmg/Rchg(11), PstBls-Acc/Dmg/EndRdx(15)
Level 4: Reach for the Limit 
Level 6: Rain of Fire -- PstBls-Acc/Dmg(A), PstBls-Dmg/EndRdx(7), PstBls-Dmg/Rchg(7), PstBls-Dmg/Rng(11), PstBls-Acc/Dmg/EndRdx(46)
Level 8: Fire Breath -- PstBls-Acc/Dmg(A), PstBls-Dmg/EndRdx(9), PstBls-Dmg/Rchg(9), PstBls-Acc/Dmg/EndRdx(34), PstBls-Dmg/Rng(43)
Level 10: Combat Jumping -- LucoftheG-Rchg+(A)
Level 12: Storm Kick -- KntCmb-Acc/Dmg(A), KntCmb-Dmg/EndRdx(13), KntCmb-Dmg/Rchg(13), KntCmb-Dmg/EndRdx/Rchg(42), Mk'Bit-Acc/EndRdx/Rchg(43)
Level 14: Super Jump -- BlsoftheZ-ResKB(A)
Level 16: Dragon's Tail -- Obl-Dmg(A), Obl-Acc/Rchg(17), Obl-Dmg/Rchg(17), Obl-Acc/Dmg/Rchg(23), Obl-%Dam(37), Obl-Acc/Dmg/EndRdx/Rchg(42)
Level 18: Blaze -- Thn-Dmg/EndRdx(A), Thn-Dmg/Rchg(19), Thn-Acc/Dmg/Rchg(19), Thn-Acc/Dmg/EndRdx(23), Thn-Dmg/EndRdx/Rchg(40)
Level 20: Reaction Time -- PrfShf-EndMod(A), PrfShf-EndMod/Rchg(21), PrfShf-EndMod/Acc(21)
Level 22: Boxing -- Empty(A)
Level 24: Tough -- Ags-ResDam(A), Ags-ResDam/EndRdx(25), Ags-ResDam/EndRdx/Rchg(25), StdPrt-ResDam/Def+(34)
Level 26: Hasten -- RechRdx-I(A), RechRdx-I(37)
Level 28: Inner Will -- Prv-Heal(A), Prv-Heal/Rchg(29), Prv-Heal/Rchg/EndRdx(29)
Level 30: Weave -- LucoftheG-Rchg+(A), LucoftheG-Def(31), LucoftheG-Def/EndRdx(31), ShlWal-ResDam/Re TP(31)
Level 32: Inferno -- Arm-Dmg(A), Arm-Dmg/Rchg(33), Arm-Acc/Dmg/Rchg(33), Arm-Acc/Rchg(33), Arm-Dmg/EndRdx(34)
Level 35: Throw Sand -- SphIns-Acc/ToHitDeb(A), SphIns-Acc/Rchg(36), SphIns-ToHitDeb/EndRdx/Rchg(36), SphIns-Acc/EndRdx/Rchg(36), SphIns-%ToHit(37)
Level 38: Eagles Claw -- SprBlsWrt-Acc/Dmg(A), SprBlsWrt-Dmg/Rchg(39), SprBlsWrt-Acc/Dmg/Rchg(39), SprBlsWrt-Acc/Dmg/EndRdx(39), SprBlsWrt-Acc/Dmg/EndRdx/Rchg(40), SprBlsWrt-Rchg/Dmg%(40)
Level 41: Bonfire -- Empty(A), Dtn-Acc/Dmg(42), Dtn-Dmg/EndRdx(43), Dtn-Acc/Dmg/EndRdx(46), Dtn-Dmg/Rchg(46)
Level 44: Fire Shield -- Ags-ResDam(A), Ags-ResDam/EndRdx(45), Ags-ResDam/EndRdx/Rchg(45), GldArm-3defTpProc(45)
Level 47: Burst of Speed -- SprAvl-Acc/Dmg(A), SprAvl-Dmg/EndRdx(48), SprAvl-Acc/Dmg/EndRdx(48), SprAvl-Acc/Dmg/Rchg(48), SprAvl-Acc/Dmg/EndRdx/Rchg(50), SprAvl-Rchg/KDProc(50)
Level 49: Aim -- RctRtc-ToHit(A), RctRtc-ToHit/Rchg(50)
Level 1: Brawl -- Empty(A)
Level 1: Defiance 
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 -- NmnCnv-Regen/Rcvry+(A), Prv-Absorb%(27)
Level 2: Hurdle -- Empty(A)
Level 2: Stamina -- EndMod-I(A), EndMod-I(27)
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[Mr. Vee]

I had it for a while leveling. Never remembered to use it and didn't particularly need it but seemed meh when i did use it. Didn't have room in my final build so can't speak to its utility on a fully IOd toon.