Make Up Your Own Suicide Squad Roster

[Agent Z]

For me:

Rick Flag
Katarina Armstrong
Nightshade
Killer Frost (Louise Lincoln)
Angle Man
Vixen
Cheshire
El Diablo
Deadshot

[CRaymond]

Deadshot (squad captain), supersenses / trajectory
El Diablo, deific pyrokinesis & transmorph(fire god)
Harley Quinn, chemically enhanced strength, durability and healing
Poison Ivy, plant manipulation via connection to The Green
Catman, supersenses / agility

Boomerang (ex-squad captain, escapee), supersense / trajectory
Livewire (escapee), electrokinetic & transmorph(electricity)

[Osiris-Rex]

Rick Flag - Leadership
Deadshot - Long distance killing
El Diablo - Fire
Killer Frost - Ice
Black Siren - Sound
Solomon Grundy - Muscle
Livewire - Electricity
Poison Ivy - Traps

[Rac7d*]

Sucide squad need 4 main who are set and a revolving door of minor villains to die off

So
Deadshot Leader
Harley- Dc will never let her go
Boomer-
(Insert muclehead)

[Lee Stone]

Sucide squad need 4 main who are set and a revolving door of minor villains to die off

I agree that half or less of the team should be permanent, with maybe even the writer trolling the readers by almost killing one or two of them every now and then.
And the other half should be more expendable minor villains or forgotten, obscure heroes, with a high risk of being killed. Although, I wouldn't kill them all off. Build tension by having only one or two die during major missions and send the survivors off into the sunset with a new lease on life and a chance to be reused later.
Only thing worse than having a group full of 'can't be killed' members, is having a predictable assortment of members where you know who will die because they're not the core members.

With that said, about six to eight members, depending on the mission sounds about right, so I'd also go with a core group of four.
However, I'd also have some reserves to help fill out the team whenever the main members get injured.

Core:
Rick Flagg
Deadshot
Onyx (she's not being used anywhere, I believe)
Nemesis

Core reserves:
Bronze Tiger
Arsenal
Fire
Cheshire

[WonderScott]

My one-time only team, coerced into a mission to Apokolips to rescue a captured Justice League. A six issue miniseries starring:

Amanda Waller
King Faraday
Steve Trevor

Team Leaders: Big Barda and Mister Miracle
Deathstroke
Maxima
Cheetah
Black Adam
Sinestro
Reverse Flash
Queen Clea
Wotan

[CRaymond]

I think the constant threat of death is a SS motif that can be sunset. "Suicide" can be implied by their haphazard and impulsive behaviors.

[Shazamdude]

I got it!

Amanda Waller (administrator, no field work)
Black manta
Dead shot
Captain cold
Harley quinn
Yo-yo (evil plastic man)

[MajorHoy]

Dan DiDio
Jim Lee
Tom King
Brian Michael Bendis
(more to follow . . . )

[scribbleMind]

Animal Man
Shado
Metallo
Silver Banshee
Gentleman Ghost
Bulleteer

[9th.]

Bronze Tiger
Mirror Master
Cheshire
Deadshot
Captain Boomerang
Mammoth
Killer Frost

[Mutant God]

Azrael
Black Manta
Metallo
Silver Swan
Plunder
Madam Rouge
Constantine Drakon

[MajorHoy]

And, by the way, http://community.comicbookresources....-Suicide-Squad

[Commander Wort]

Black Manta
Dead Shot
Captain Cold
Harley Quinn
Cheetah
Metallo
Atrocitus

[Denirac]

First I'd depose Waller and set Adeline Kane (Slade's ex Wife) and Steve Trevor in charge

Roster:
Bronze Tiger (Field Leader)
Metallo
Cheshire
Sportsmaster
Killer Moth
Count Vertigo
Terra
Gentleman Ghost
The Riddler (Tech Support)

Reserves:
Constantin Drakon
The Trickster (Axel) (allowing James Jesse to return to the Rogues)
Abbitoir
The Condiment King
Kite Man
Cat Man
Hector Hammond
Calculator
King Tut
And The Eraser