Hmm.
Temp inv, unyielding = 1 end redux, 3 res
resist elements/resist energy/resist phys damage = 3 res
invinciblity = Im not sure actually, 1 end redux, 3 def buff propably, maybe add 1 taunt
fly = 2 end redux, 2 fly speed
dull pain = 3 heal,3 recharge reduction
health = 3 heal
unstoppable = 3 recharge reduction, up to you add extra res (with 2 res you hit the resistance caps without any other powers, whether you need that is up to you. Possible to add endurance modification to help with sappers)
focused accuracy = 3 end redux, acc buff im not sure, depends.
stamina= 3 end mod
I doubt you'll need conserve energy much, but it doesnt need more than 3 recharge in any case.
Most attacks that you plan on using = 2 acc,3 damage,1 recharge redux
Stun = 2 acc, 1-2 disorient duration, 3-2 recharge
PS. If youre not into PvP, Other epic pools might be more fun..
Power order's a bit bad, I'd go like:
---------------------------------------------
Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder
---------------------------------------------
Name:
Level: 50
Archetype: Tanker
Primary: Invulnerability
Secondary: Energy Melee
---------------------------------------------
01) --> Resist Physical Damage==> Empty(1)
01) --> Barrage==> Empty(1)
02) --> Temp Invulnerability==> Empty(2)
04) --> Dull Pain==> Empty(4)
06) --> Resist Elements==> Empty(6)
08) --> Unyielding==> Empty(8)
10) --> Bone Smasher==> Empty(10)
12) --> Hasten==> Empty(12)
14) --> Super Speed==> Empty(14)
16) --> Swift==> Empty(16)
18) --> Invincibility==> Empty(18)
20) --> Health==> Empty(20)
22) --> Stamina==> Empty(22)
24) --> Taunt==> Empty(24)
26) --> Tough Hide==> Empty(26)
28) --> Resist Energies==> Empty(28)
30) --> Whirling Hands==> Empty(30)
32) --> Unstoppable==> Empty(32)
35) --> Energy Transfer==> Empty(35)
38) --> Total Focus==> Empty(38)
41) --> Char==> Empty(41)
44) --> Fire Blast==> Empty(44)
47) --> Fire Ball==> Empty(47)
49) --> Build Up==> Empty(49)
---------------------------------------------
01) --> Sprint==> Empty(1)
01) --> Brawl==> Empty(1)
01) --> Gauntlet==> Empty(1)
02) --> Rest==> Empty(2)
---------------------------------------------
[ QUOTE ]
Most attacks that you plan on using = 2 acc,3 damage,1 recharge redux
[/ QUOTE ]
I would say 2 ACCs is completely unnecessary for PvE tanking, if you are doing your tanking right you should have a few enemies around you and the few percentage points of to hit buff you get performs as well as the second ACC in your attacks. Also as a tank you are unlikely to survive against the really high level enemies that you may need 2 ACCs for.
I would generally slot 1x end red in all attacks as a tank running out of endurnace is a dead tank.
Back to the original poster...
My general Inv advice is
Get Temp Invulnerability at level 1, slot it up to 3 or 4 slots early.
Get Bone Smasher at level 4, as above.
Get Unyielding at level 8, slotting is not really a high priority as it makes little difference until higher levels.
Get Invincibilty at level 18, this is one of your best powers so needs 3 slots quickly.
Get Stamina at 20 or 22
Get Tough Hide at 26.
Dull Pain should be 6 slotted by about level 20ish, I would get it and slot it early as even with DOs it works well, slot it for recharge on DOs and recharge/heal on SOs.
Whirling hands is also probably a good plan too. AoEs are good for tanks to both keep aggro and do decent damage.
The passive resistance powers are a bit rubbish, I would leave them until post 20 with the possible exception of Resist Physical Damage.
Also unless you are doing it for concept reasons I would avoid Hover on a tank, in order to be useful it needs 3 speed SOs to get you to standard running speed, this is a lot of slots for a pre travel power that you could spend on defences. Air Superiority is a good alternative as it gives you a nice knockdown attack for keeping bosses on the floor.
@Unthing ... Mostly on Union.
[ QUOTE ]
Also as a tank you are unlikely to survive against the really high level enemies that you may need 2 ACCs for.
[/ QUOTE ]
Surprisingly paradoxical statement, don't you think? "AS a tank".. All I ever wanted to really go and stand face to face against enemies that cold flatten my teammates by winking an eye. Alas, such abilities were obviously overpowered..
Now, where would we find an Invuln/EM Tanker around here? 
I'll get MBar's latest build posted here later when I'm home from work.
... and if I remember ... 
Edit: One pointer to start with. Don't take Stun. It is beyond rubbish.
I don't think the protection from resist energies and elements is that great, and for the damage it will stop it might be better to get other powers with them, possibly punch and tough to give you uber S/L, your choice though.
I've made a build for an Inv/EM Tank
---------------------------------------------
Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder
---------------------------------------------
Name: The Energist
Level: 50
Archetype: Tanker
Primary: Invulnerability
Secondary: Energy Melee
---------------------------------------------
01) --> Resist Physical Damage==> Empty(1)
01) --> Barrage==> Empty(1)
02) --> Energy Punch==> Empty(2)
04) --> Temp Invulnerability==> Empty(4)
06) --> Swift==> Empty(6)
08) --> Resist Elements==> Empty(8)
10) --> Bone Smasher==> Empty(10)
12) --> Hover==> Empty(12)
14) --> Fly==> Empty(14)
16) --> Health==> Empty(16)
18) --> Unyielding==> Empty(18)
20) --> Stamina==> Empty(20)
22) --> Whirling Hands==> Empty(22)
24) --> Resist Energies==> Empty(24)
26) --> Stun==> Empty(26)
28) --> Invincibility==> Empty(28)
30) --> Tough Hide==> Empty(30)
32) --> Unstoppable==> Empty(32)
35) --> Energy Transfer==> Empty(35)
38) --> Total Focus==> Empty(38)
41) --> Conserve Power==> Empty(41)
44) --> Focused Accuracy==> Empty(44)
47) --> Laser Beam Eyes==> Empty(47)
49) --> Energy Torrent==> Empty(49)
---------------------------------------------
01) --> Sprint==> Empty(1)
01) --> Brawl==> Empty(1)
02) --> Rest==> Empty(2)
01) --> Gauntlet==> Empty(1)
---------------------------------------------
Can anyone give me advice about the slotting and maybe changes in powers? I'm gonna use the build only for PvE (Don't like PvP)