Jab is 1 power that is not really worth slotting. The damage is very low, its good for gauntlet though. Just having 1 acc (maybe add. 1 recharge) and shift the other slots to:
1 - rooted EndRed
1 - KO blow EndRed/recharge
1 - Footstomp Endred/recharge
Those 2 attacks often gonna be your main attacks and can become a bitty end heavy.
Granite Armor i went for 2def/1EndRed, every bit of end more helps abit 
50)Sinergy X/(50)Mika.
(50)MaceX/(50)Encore
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Id look to go 1 acc 1 end 2 dam and 2 rechg in attacks on this for better endurance, still good dps and good rechg when in granite a change to single IO slots would be straight forward an all.
Taunt is underslotted for Granite mode taunting imo and i have done tests when holding AVs taunt duration must reach the recharge of the next taunt, you dont want to be "damn i have lost aggro, hang on taunt is recharging" just as *rage crashes*. Your -rechgd in Granite and then some attacks go and -rechg you. Psi attacks do that but with them you should be in Minerals. I loved taunt early on my stonetank, with a lack of slots and long fight durations versus kbd mobs having to tp about at high end cost would of been a pain where as taunt costs nothing and will be autohit.
Your end reduxing your toggles and not the attack chain so it could be a case of a 2.5 eps attack chain for the sake of getting toggles to 0.75 eps from 1 eps. The /SS attacks may average 1.16 eps but the attack chain is always higher.
My figures are rough guestimates cos i cant be bothered to look in order to outgeek anyone.
He will honor his words; he will definitely carry out his actions. What he promises he will fulfill. He does not care about his bodily self, putting his life and death aside to come forward for another's troubled besiegement. He does not boast about his ability, or shamelessly extol his own virtues. - Sima Qian.
with rage and FocAcc you definately won't need 2xAcc in your attacks, you may even be fine with no acc in your powers.. but dont quote me on that, cos i've never tried it.
Can be tricky though, when u run out of end you have to wait for the powers to recharge. Worse, if you exemp down to a lvl where you dont have FocAcc, as rage has nasty 10sec crash and with granite (or hasten down) its not perma.
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(50)MaceX/(50)Encore
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Thanks for your help everyone. I can say that I played from 1 - 13 on Friday and found it a lot of fun.
I will likely respec when I get to Granite (doesn't everyone?) and replace the damage on lower level attacks with recharges. Either that or seek out yummy Dam/Rchg IOs. 
The Focused Accuracy is to try and counter for Granite's -acc but yes, for the 30s and when I exemp back down, I like to have two Accs in my attacks (Blaster mentality here 
).
@Dante EU - Union Roleplayer and Altisis Victim
The Militia: Union RP Supergroup - www.themilitia.org.uk
Dont worry, granite do NOT have -acc
Granite stays at -recharge (60-70%ish), -slow (60% iirc), -damage (30%) and the 3 forms to travel (sprint/jump/fly).
50)Sinergy X/(50)Mika.
(50)MaceX/(50)Encore
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It doesn't? I must have read something wrong while researching then. Maybe I'll drop the second acc from the attacks then.
Thanks for the correction.
@Dante EU - Union Roleplayer and Altisis Victim
The Militia: Union RP Supergroup - www.themilitia.org.uk
it used to have -acc i think, got removed ages ago though. some of the hero builders still say it has though, cause they're using old stats.
I have been thinking at having another go at tanking recently and the sets that appeal to me the most are Stone/SS. I've run up a quick build which I have posted below. If anyone who's played this set could give me some pointers, it would be greatly appreciated. I've only ever tried Inv/En before so if I've chosen a hard set or gimped my build, it'd be great to know.
As usual, many thanks.
---------------------------------------------
Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder
---------------------------------------------
Name:
Level: 50
Archetype: Tanker
Primary: Stone Armor
Secondary: Super Strength
---------------------------------------------
01) --> Rock Armor==> DefBuf(1)DefBuf(3)DefBuf(3)EndRdx(15)
01) --> Jab==> Acc(1)Dmg(5)Dmg(13)Acc(36)Dmg(45)
02) --> Punch==> Acc(2)Dmg(5)Dmg(13)Acc(36)Dmg(43)
04) --> Earth's Embrace==> Rechg(4)Rechg(7)Rechg(7)Heal(29)Heal(29)Heal(40)
06) --> Swift==> Run(6)Run(9)Run(39)
08) --> Mud Pots==> EndRdx(8)EndRdx(9)EndRdx(11)Taunt(19)Taunt(23)
10) --> Rooted==> Heal(10)Heal(11)Heal(17)
12) --> Teleport Foe==> Acc(12)
14) --> Teleport==> EndRdx(14)EndRdx(15)
16) --> Haymaker==> Acc(16)Dmg(17)Dmg(19)Dmg(27)Acc(37)
18) --> Health==> Heal(18)Heal(23)Heal(37)
20) --> Stamina==> EndMod(20)EndMod(21)EndMod(21)
22) --> Taunt==> Rechg(22)Rechg(37)Rechg(40)
24) --> Hasten==> Rechg(24)Rechg(25)Rechg(25)
26) --> Crystal Armor==> DefBuf(26)DefBuf(27)DefBuf(46)EndRdx(46)
28) --> Knockout Blow==> Acc(28)Dmg(31)Dmg(31)Acc(36)Dmg(43)
30) --> Rage==> Rechg(30)Rechg(31)Rechg(34)
32) --> Granite Armor==> DmgRes(32)DmgRes(33)DmgRes(33)DefBuf(33)DefBuf(34)DefBuf(34)
35) --> Stone Skin==> DmgRes(35)
38) --> Foot Stomp==> Acc(38)Dmg(39)Dmg(39)Acc(40)Dmg(43)Rechg(46)
41) --> Minerals==> DefBuf(41)DefBuf(42)DefBuf(42)EndRdx(42)
44) --> Conserve Power==> Rechg(44)Rechg(45)Rechg(45)
47) --> Focused Accuracy==> EndRdx(47)EndRdx(48)EndRdx(48)TH_Buf(48)TH_Buf(50)TH_Buf(50)
49) --> Laser Beam Eyes==> Acc(49)Acc(50)
---------------------------------------------
01) --> Sprint==> Run(1)
01) --> Brawl==> Acc(1)
01) --> Gauntlet==> Empty(1)
02) --> Rest==> Rechg(2)
---------------------------------------------
@Dante EU - Union Roleplayer and Altisis Victim
The Militia: Union RP Supergroup - www.themilitia.org.uk