you have made a HUGE mistake by leaving screech out of a pvp build, the ranged stun is the gem of the sonic set especially for pvp as acro doesnt protect from disorient. Screech will drop squishies left right and centre.
Ask Jum for advice, hes the pvp sonic daddy
**Acceptable "support" responses**
Its your fault
Its your computers fault
Its your ISPs fault
Oh blimey, What can I drop so I can squeeze screech in?
drop howl, damage is weak, long rooting animation and high endurance cost. The rest of your damage chain is ST so seems pointless to have on mediocre cone attack IMO.
Sirens song is one that looks like you could drop but it perfect for taking out pesky bubblers as dispersion doesnt ahve resistance to sleep.
with screech in and howl out I think you should have a pretty good build. I prefer SS myself though.
**Acceptable "support" responses**
Its your fault
Its your computers fault
Its your ISPs fault
I'm thinking of trying to squeeze Acrobatics somewhere in there. Get some much needed KB protection.
I've already got howl on my character, I should be fine as is until I start PvPing, predominantly however, this is a PvE build. 
Another thing you will find in PvP is this is very endurance heavy unless you slot endurance reductions in attack powers. The electric attacks are pretty endurance intensive and power sink cannot be relied upon to replenish endurance - too risky most of the time.
PvE however, its the daddy - but you'll still find yourself out of endurance in prolonged AV fights (if no SB etc)
how dare you enjoy a blaster l'aust!!! :P
Oh I am! Yes!
Level 16 now! Just gotta wait until 24 before a new interesting power comes along, they're all pretty standard from here to there. 
Slight bit of Threadomancy but I've started playing one of these last night and its great fun. Intended as a PvE build which is PvP friendly.
Here's the build up to 40. Obvious mistake is the 2 recharge in Hasten, I'll squeeze another one in there from somewhere. I might drop Shriek for Combat Jumping and stick the extra slot from there...
Also available Online
+---------------------------------------------
+ Built with SuckerPunch's Online Planner
+ http://www.cohplanner.com
+---------------------------------------------
Name: Thermin
Level: 41
Archetype: Blaster
Primary: Sonic Blast
Secondary: Electricity Manipulation
+---------------------------------------------
01 => Electric Fence
Accuracy(1)
Accuracy(5)
01 => Shriek
Accuracy(1)
Accuracy(3)
02 => Scream
Accuracy(2)
Accuracy(3)
Damage(7)
Damage(15)
Damage(40)
04 => Charged Brawl
Accuracy(4)
Accuracy(5)
Damage(7)
Damage(15)
Damage(25)
06 => Hasten
Empty(6)
Empty(9)
08 => Shout
Accuracy(8)
Accuracy(9)
Damage(11)
Damage(11)
Damage(25)
10 => Hurdle
Jump(10)
12 => Amplify
Attack Rate(12)
Attack Rate(13)
Attack Rate(13)
14 => Super Speed
Running Speed(14)
16 => Havoc Punch
Accuracy(16)
Accuracy(17)
Damage(17)
Damage(19)
Damage(19)
Attack Rate(40)
18 => Swift
Running Speed(18)
20 => Stamina
Endurance Modification(20)
Endurance Modification(21)
Endurance Modification(21)
22 => Build Up
Attack Rate(22)
Attack Rate(23)
Attack Rate(23)
24 => Stimulant
Interrupt Time(24)
26 => Screech
Accuracy(26)
Accuracy(27)
Disorient Duration(27)
Disorient Duration(34)
Attack Rate(37)
Attack Rate(37)
28 => Aid Self
Heal(28)
Heal(29)
Interrupt Time(29)
30 => Thunder Strike
Accuracy(30)
Accuracy(31)
Damage(31)
Damage(31)
Damage(34)
Endurance Cost(40)
32 => Dreadful Wail
Accuracy(32)
Damage(33)
Damage(33)
Damage(33)
Attack Rate(34)
Attack Rate(37)
35 => Power Sink
Attack Rate(35)
Attack Rate(36)
Endurance Modification(36)
Endurance Modification(36)
38 => Shocking Grasp
Accuracy(38)
Accuracy(39)
Hold Duration(39)
Hold Duration(39)
01 => Sprint
Empty()
01 => Brawl
Empty()
02 => Rest
Empty()
+---------------------------------------------
What has Nightbringer started! 
I blame Xanthus.
SingStar:
"Extremists LOVE to fish to get us annoyed so we break the forum rules."
CRACK68:
"The origin of life wasn't planned either, should all life be declared a bug and wiped out?"
Lionsbane:
"You know me.Ever the realist"
[ QUOTE ]
I'm thinking of trying to squeeze Acrobatics somewhere in there. Get some much needed KB protection.
I've already got howl on my character, I should be fine as is until I start PvPing, predominantly however, this is a PvE build.
[/ QUOTE ]
You never said this was is a PvP build anyway. Think some peeps are too preoccupied and seeing things! 
And oh, you can drop acro and safely put a karma KB prot IO in CJ. Will do nicely for 95% of the time 
Wow, this is the first blaster I've ever played that I really enjoy!
Good clean blapper fun!
This character is a bit insane.
Sirens Song will be my main attack-opener when soloing, so I can concentrate on enemies one at a time. AoE powers like Howl, Thunder Strike, Dreadful Wail will be used in teams. Where the benefits of Sirens Song will largely be wasted.
Hence, I'm putting my prospective build up for analysis, what do you dudes think of this? I'm thinking it may be worth squeezing in acrobatics in there somewhere, but then something else has to go! What am I going to do? Oh noes!
Here he is:
---------------------------------------------
Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder
---------------------------------------------
Name: Howling Monkey Robot
Level: 50
Archetype: Blaster
Primary: Sonic Blast
Secondary: Electricity Manipulation
---------------------------------------------
01) --> Scream==> Acc(1)Acc(3)Dmg(5)Dmg(15)Dmg(42)Rechg(46)
01) --> Electric Fence==> Acc(1)
02) --> Charged Brawl==> Acc(2)Acc(3)Dmg(7)Dmg(15)Dmg(42)Rechg(43)
04) --> Howl==> Acc(4)Acc(5)Dmg(7)Dmg(19)Dmg(27)Rechg(43)
06) --> Combat Jumping==> DefBuf(6)
08) --> Shout==> Acc(8)Acc(9)Dmg(9)Dmg(13)Dmg(27)Rechg(46)
10) --> Havoc Punch==> Acc(10)Acc(11)Dmg(11)Dmg(13)Dmg(19)Rechg(43)
12) --> Swift==> Run(12)
14) --> Super Jump==> Jump(14)
16) --> Build Up==> Rechg(16)Rechg(17)Rechg(17)
18) --> Hurdle==> Jump(18)
20) --> Stamina==> EndMod(20)EndMod(21)EndMod(21)
22) --> Amplify==> Rechg(22)Rechg(23)Rechg(23)
24) --> Siren's Song==> Acc(24)Acc(25)Rechg(25)Rechg(42)
26) --> Stimulant==> IntRdx(26)
28) --> Thunder Strike==> Acc(28)Acc(29)Dmg(29)Dmg(37)Dmg(40)Rechg(40)
30) --> Aid Self==> Heal(30)Heal(31)Heal(31)IntRdx(31)IntRdx(34)
32) --> Dreadful Wail==> Dmg(32)Dmg(33)Dmg(33)Rechg(33)Rechg(34)Rechg(34)
35) --> Power Sink==> EndMod(35)EndMod(36)EndMod(36)Rechg(36)Rechg(37)Rechg(37)
38) --> Shocking Grasp==> Acc(38)Acc(39)Dmg(39)Dmg(39)Dmg(40)Rechg(45)
41) --> Personal Force Field==> EndRdx(41)
44) --> Temp Invulnerability==> DmgRes(44)DmgRes(45)DmgRes(45)EndRdx(46)
47) --> Force of Nature==> Rechg(47)Rechg(48)Rechg(48)DmgRes(48)DmgRes(50)
49) --> Hasten==> Rechg(49)Rechg(50)Rechg(50)
---------------------------------------------
01) --> Sprint==> Run(1)
01) --> Brawl==> Acc(1)
01) --> Defiance==> Empty(1)
02) --> Rest==> IntRdx(2)
---------------------------------------------
You'll find this character semi-regularly on Union.