More than 3 of any enhancement type in a power is a waste. Take the 4th RES and DMG enhancements out and either move the slots or replace them with something more useful like End Reduction or Accuracy.
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Before i say anything are you planning on soloing mostly and when if you do, do you want to start team tanking from? The power choices and the level you have chosen with them make you more of a tough scrapper than a tanker until lvl 24. People will be expecting you to tank so it maybe a good idea to tell them you'd be hitting air, gauntleting nothing and not helping the team at all against certain enemy types so they can play a bit more on the back heal. Also if you are first one in, the run in faceplant maneuver could be what you can expect to have without dull pain, which is always 6 slotted asap with me, and you get extra lifepoints. Your gonna want temp invulnerability atleast 3 slotted for res at 12 and same for unyielding too. Endurance wise you'd be the grandad of the team a couple of moves and resting. Axe is probably the most endurance hungry powerset a tanker can have.
More than 3 of anything is a waste and more than 1 of something can be too so i suggest you look at the figures.
This is the minimum amount of slotting id have on the invuln and fitness side of things now although in reality there is about 4 more its just to show my idea of a bare minimum.
Resist Physical Damage==> DmgRes DmgRes DmgRes
Temp Invulnerability==> DmgRes DmgRes DmgRes EndRdx
Dull Pain==> Rechg Rechg Rechg Heal Heal Heal
Resist Elements==> DmgRes DmgRes DmgRes
Unyielding==> DmgRes DmgRes DmgRes EndRdx
Resist Energies==> DmgRes DmgRes DmgRes
Hurdle==> Jump
Health==> Heal Heal Heal
Invincibility==> Taunt DefBuf DefBuf DefBuf
Stamina==> EndMod EndMod EndMod
Tough Hide==> DefBuf
Unstoppable==> Rechg Rechg Rechg EndMod DmgRes
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unstoppable can be played with just 3 slots, but Id really really recommend dull pain..
Yeah, sorry about that, I couldn't fit it into the build, anyway, I got my toon up to lvl 10 now, but I don't know if I followed my slotting exactily.
Sorry for double posting, but I couldn't edit my last post in time, but after much thought I think I'll leave out build up for dull pain. 
Try and slot some end rec in your toggles. Otherwise you will be wheezing like hell after every fight.
@Byrne
Debtmeister General of The Plastic Army & Empire
OK, this isn't my main, but it will be my hero main, I'm no expert on slotting or which attacks to pick over others, so here I go.
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Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder - (http://sherksilver.coldfront.net/index.php)
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Name: Battle Ready
Level: 50
Archetype: Tanker
Primary: Invulnerability
Secondary: Battle Axe
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01) --> Resist Physical Damage==> DmgRes(1) DmgRes(5) DmgRes(7) DmgRes(34)
01) --> Gash==> Dmg(1) Dmg(3) Dmg(13) Acc(40) Acc(46)
02) --> Chop==> Dmg(2) Dmg(3) Dmg(9) Acc(40) Acc(46)
04) --> Temp Invulnerability==> DmgRes(4) DmgRes(5) DmgRes(37)
06) --> Resist Elements==> DmgRes(6) DmgRes(7) DmgRes(11) DmgRes(34)
08) --> Hasten==> Rechg(8) Rechg(9) Rechg(15)
10) --> Hurdle==> Jump(10) Jump(11) Jump(36)
12) --> Unyielding==> DmgRes(12) DmgRes(13) DmgRes(25)
14) --> Super Speed==> Run(14) Run(15) Run(37)
16) --> Beheader==> Dmg(16) Dmg(17) Dmg(17) Dmg(31) Acc(43) Acc(46)
18) --> Health==> Heal(18) Heal(19) Heal(19)
20) --> Stamina==> EndMod(20) EndMod(21) EndMod(21) EndMod(50)
22) --> Resist Energies==> DmgRes(22) DmgRes(23) DmgRes(23) DmgRes(34)
24) --> Invincibility==> DefBuf(24) DefBuf(25) TH_Buf(37)
26) --> Tough Hide==> DefBuf(26) DefBuf(27) DefBuf(27) DefBuf(39)
28) --> Swoop==> Acc(28) Acc(29) Dmg(29) Dmg(40)
30) --> Build Up==> Rechg(30) Rechg(31) Rechg(31) Rechg(33)
32) --> Unstoppable==> Rechg(32) Rechg(33) Rechg(33)
35) --> Cleave==> Dmg(35) Dmg(36) Dmg(36) Dmg(43)
38) --> Pendulum==> Acc(38) Acc(39) Dmg(39) Dmg(43)
41) --> Block of Ice==> Hold(41) Hold(42) Dmg(42) Acc(42)
44) --> Chilblain==> Immob(44) Immob(45) Dmg(45) Acc(45)
47) --> Ice Storm==> Dmg(47) Dmg(48) Dmg(48) Rechg(48)
49) --> Whirlwind==> KB_Dist(49) KB_Dist(50) KB_Dist(50)
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01) --> Sprint==> Run(1)
01) --> Brawl==> Dmg(1)
01) --> Gauntlet==> Empty(1)
02) --> Rest==> Rechg(2)
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Like I said, I'm no expert, but your critisicm and advice is appreciated, thank you.