I actually searched way back on this forum and found a build that I liked for the most part. I'm using a modified version of it and I'm liking the Bane better than the Crab atm. The build for some odd reason didn't take Venom Grenade but took Poison Ray. I swapped those out. It also has no travel powers which worried me a bit but I'm finding that even without set bonuses, a single run IO in Sprint, Mental Training, and Rush gets me along at a pretty good pace. The rocket pack from GV is a big help too.
Soloing there's just no comparison. In teams the Crab provides better buffs but despite the massive AOE damage it somehow feels more satisfying to actually see a mob's health bar go down when you hit it. My SG loves the Crab's buffs though so I'm sure I'll keep playing it. I just got my Spiderlings last night and that's a neat addition.
Here's the difference between these two classes though. With my Crab I had real difficulty taking down an equal level boss. If I didn't have the right inspirations to eat, I was toast. I had a mission with my Crab and got stuck when I hit a red boss. I got slaughtered.
I went back to the arbiter and leveled up my second build as a Bane. I returned to the mission with POWERS UNSLOTTED and owned it. 
Surv + BU + Shatter + VG + CC = dead everything in a non-boss group.
The build
Villain Plan by Mids' Villain Designer 1.401
http://www.cohplanner.com/
[u]Click this DataLink to open the build![u]
Arachnia Theroph: Level 50 Natural Arachnos Soldier
Primary Power Set: Bane Spider Soldier
Secondary Power Set: Bane Spider Training
Power Pool: Fitness
Power Pool: Speed
Power Pool: Leadership
Power Pool: Leaping
Villain Profile:
Level 1: Bash <ul type="square">[*] (A) 
Touch of Death - Accuracy/Damage[*] (3) 
Touch of Death - Damage/Endurance[*] (3) 
Touch of Death - Damage/Recharge[*] (31) 
Touch of Death - Accuracy/Damage/Endurance[*] (34) 
Touch of Death - Damage/Endurance/Recharge[*] (36) 
Touch of Death - Chance of Damage(Negative)[/list]
Level 1: Bane Spider Armor Upgrade <ul type="square">[*] (A) 
Titanium Coating - Resistance/Endurance[*] (7) 
Titanium Coating - Resistance/Recharge[*] (7) 
Titanium Coating - Endurance/Recharge[*] (9) 
Titanium Coating - Resistance/Endurance/Recharge[*] (9) 
Titanium Coating - Resistance[*] (42) 
Titanium Coating - Endurance[/list]
Level 2: Combat Training: Defensive <ul type="square">[*] (A) 
Defense Buff IO[*] (5) 
Karma - Defense/Recharge[*] (5) 
Karma - Knockback Protection[/list]
Level 4: Wolf Spider Armor <ul type="square">[*] (A) 
Steadfast Protection - Resistance/+Def 3%[/list]
Level 6: Build Up <ul type="square">[*] (A) 
Gaussian's Synchronized Fire-Control - To Hit Buff[*] (40) 
Gaussian's Synchronized Fire-Control - Recharge/Endurance[*] (42) 
Gaussian's Synchronized Fire-Control - To Hit Buff/Endurance[*] (42) 
Gaussian's Synchronized Fire-Control - Chance for Build Up[*] (43) 
Gaussian's Synchronized Fire-Control - To Hit Buff/Recharge[*] (43) 
Gaussian's Synchronized Fire-Control - To Hit Buff/Recharge/Endurance[/list]
Level 8: Swift <ul type="square">[*] (A) 
Run Speed IO[/list]
Level 10: Tactical Training: Maneuvers <ul type="square">[*] (A) 
Defense Buff IO[*] (11) 
Defense Buff IO[*] (11) 
Defense Buff IO[/list]
Level 12: Venom Grenade <ul type="square">[*] (A) 
Detonation - Accuracy/Damage[*] (13) 
Detonation - Damage/Endurance[*] (13) 
Detonation - Damage/Recharge[*] (37) 
Detonation - Damage/Range[*] (37) 
Detonation - Damage/Endurance/Range[*] (37) 
Detonation - Accuracy/Damage/Endurance[/list]
Level 14: Pulverize <ul type="square">[*] (A) 
Touch of Death - Accuracy/Damage[*] (15) 
Touch of Death - Damage/Endurance[*] (15) 
Touch of Death - Damage/Recharge[*] (17) 
Touch of Death - Accuracy/Damage/Endurance[*] (17) 
Touch of Death - Damage/Endurance/Recharge[*] (23) 
Touch of Death - Chance of Damage(Negative)[/list]
Level 16: Health <ul type="square">[*] (A) 
Numina's Convalescence - +Regeneration/+Recovery[/list]
Level 18: Shatter <ul type="square">[*] (A) 
Touch of Death - Accuracy/Damage[*] (19) 
Touch of Death - Damage/Endurance[*] (19) 
Touch of Death - Damage/Recharge[*] (21) 
Touch of Death - Accuracy/Damage/Endurance[*] (21) 
Touch of Death - Damage/Endurance/Recharge[*] (23) 
Touch of Death - Chance of Damage(Negative)[/list]
Level 20: Stamina <ul type="square">[*] (A) 
Performance Shifter - Chance for +End[*] (43) 
Performance Shifter - EndMod[*] (50) 
Efficacy Adaptor - EndMod[/list]
Level 22: Mental Training <ul type="square">[*] (A) 
Run Speed IO[*] (48) 
Run Speed IO[*] (50) 
Run Speed IO[/list]
Level 24: Cloaking Device <ul type="square">[*] (A) 
Defense Buff IO[*] (25) 
Defense Buff IO[*] (25) 
Defense Buff IO[/list]
Level 26: Placate <ul type="square">[*] (A) 
Recharge Reduction IO[*] (27) 
Recharge Reduction IO[*] (27) 
Recharge Reduction IO[/list]
Level 28: Surveillance <ul type="square">[*] (A) 
Achilles' Heel - Chance for Res Debuff[*] (29) 
Recharge Reduction IO[*] (29) 
Recharge Reduction IO[*] (46) 
Accuracy IO[/list]
Level 30: Hasten <ul type="square">[*] (A) 
Recharge Reduction IO[*] (31) 
Recharge Reduction IO[*] (31) 
Recharge Reduction IO[/list]
Level 32: Crowd Control <ul type="square">[*] (A) 
Scirocco's Dervish - Accuracy/Damage[*] (33) 
Scirocco's Dervish - Damage/Endurance[*] (33) 
Scirocco's Dervish - Damage/Recharge[*] (33) 
Scirocco's Dervish - Accuracy/Recharge[*] (34) 
Scirocco's Dervish - Accuracy/Damage/Endurance[*] (34) 
Scirocco's Dervish - Chance of Damage(Lethal)[/list]
Level 35: Maneuvers <ul type="square">[*] (A) 
Defense Buff IO[*] (36) 
Defense Buff IO[*] (36) 
Defense Buff IO[/list]
Level 38: Call Reinforcements <ul type="square">[*] (A) 
Recharge Reduction IO[*] (39) 
Recharge Reduction IO[*] (39) 
Recharge Reduction IO[*] (39) 
Damage Increase IO[*] (40) 
Damage Increase IO[*] (40) 
Sovereign Right - Accuracy/Damage[/list]
Level 41: Poisonous Ray <ul type="square">[*] (A) 
Decimation - Accuracy/Damage[*] (45) 
Decimation - Damage/Endurance[*] (45) 
Decimation - Damage/Recharge[*] (45) 
Decimation - Accuracy/Endurance/Recharge[*] (46) 
Decimation - Accuracy/Damage/Recharge[*] (46) 
Decimation - Chance of Build Up[/list]
Level 44: Assault <ul type="square">[*] (A) 
Endurance Reduction IO[/list]
Level 47: Tactical Training: Leadership <ul type="square">[*] (A) 
Adjusted Targeting - To Hit Buff[*] (48) 
Adjusted Targeting - To Hit Buff/Endurance/Recharge[*] (48) 
Adjusted Targeting - To Hit Buff/Endurance[*] (50) 
Adjusted Targeting - To Hit Buff/Recharge[/list]
Level 49: Combat Jumping <ul type="square">[*] (A) 
Defense Buff IO[/list]
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Level 1: Brawl <ul type="square">[*] (A) 
Damage Increase IO[/list]
Level 1: Sprint <ul type="square">[*] (A) 
Celerity - RunSpeed[/list]
Level 2: Rest <ul type="square">[*] (A) 
Recharge Reduction IO[/list]
Level 1: Conditioning 
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