Taking the power picks you posted as a guideline, this is how I would take and slot those powers...
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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:
Level: 50
Archetype: Tanker
Primary: Fiery Aura
Secondary: Fiery Melee
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01) --> Fire Shield==> DmgRes(1) DmgRes(3) DmgRes(3) EndRdx(5)
01) --> Scorch==> Acc(1) Dmg(46) Dmg(48) Dmg(50)
02) --> Blazing Aura==> EndRdx(2) EndRdx(5) Acc(11) Acc(13) Dmg(13) Dmg(15)
04) --> Healing Flames==> Rechg(4) Rechg(7) Rechg(7) Heal(9) Heal(9) Heal(11)
06) --> Combat Jumping==> DefBuf(6)
08) --> Boxing==> Acc(8)
10) --> Swift==> Fly(10) Fly(50)
12) --> Taunt==> Rechg(12) Taunt(15) Taunt(17)
14) --> Super Jump==> Jump(14)
16) --> Health==> Heal(16) Heal(17)
18) --> Plasma Shield==> DmgRes(18) DmgRes(19) DmgRes(19) EndRdx(23)
20) --> Stamina==> EndMod(20) EndMod(21) EndMod(21)
22) --> Acrobatics==> EndRdx(22) EndRdx(23)
24) --> Burn==> Dmg(24) Dmg(25) Dmg(25) Rechg(45) Rechg(46) Rechg(46)
26) --> Tough==> DmgRes(26) DmgRes(27) DmgRes(27) EndRdx(29) EndRdx(29)
28) --> Combustion==> Acc(28) Dmg(34) Dmg(34) Dmg(34) Rechg(37) EndRdx(37)
30) --> Consume==> Acc(30) Acc(31) Rechg(31) Rechg(31) EndMod(40) EndMod(43)
32) --> Fire Sword Circle==> Acc(32) Dmg(33) Dmg(33) Dmg(33) Rechg(36) EndRdx(37)
35) --> Build Up==> Rechg(35) Rechg(36) Rechg(36)
38) --> Greater Fire Sword==> Acc(38) Dmg(39) Dmg(39) Dmg(39) Rechg(40) EndRdx(40)
41) --> Focused Accuracy==> EndRdx(41) EndRdx(42) EndRdx(42) TH_Buf(42) TH_Buf(43) TH_Buf(43)
44) --> Conserve Power==> Rechg(44) Rechg(45) Rechg(45)
47) --> Fiery Embrace==> Rechg(47) Rechg(48) Rechg(48)
49) --> Hover==> Fly(49) Fly(50)
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01) --> Power Slide==> Run(1)
01) --> Sprint==> Run(1)
01) --> Brawl==> Acc(1)
01) --> Gauntlet==> Empty(1)
02) --> Rest==> Rechg(2)
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That slotting will give you maximum return for minimum endurance usage. Aside from Power Pick order, if I was designing an AoE-heavy fire tanker that's pretty much how I'd build it. The only things I'd change would be to swap out Hover for Hasten and Swift for Hurdle... but since you want Hover, that's not really an option! 
Weave is essentially useless for a fire tanker, you've nothing to stack it with besides Combat Jumping (which has a very tiny def buff). You'd get a lot more use by taking Focussed Accuracy there.
On Hover: it's VERY slow. If you slot Swift for Flight Speed and Hover for Flight Speed then you might just get from one mito to another before they finish killing them.
The other thing to consider is that people really, really hate AoEs at Hamidon raids and your toon is pretty much a AoE on legs. The only damage you'll be able to usefully contribute will be from Greater Fire Sword and Scorch because any PBAoEs could draw aggro to you from nearby mitos (The Phantom Army mito aggro control is a bit flaky these days). I'd really advise you to consider swapping in Incinerate or Fire Sword if you want to go raiding... you could swap one in instead of Focussed Accuracy if you don't want to lose a PBAoE.
many thnks Maelwys 
i had been looking at focus acc but i thought as a tnk may be a bit of a waste.Ill pop up test server later and respecc that build on him and give him a whirl.
As the i log right out of tnk onto troller for hold phase i really am there as a targetting drone so not having lots of single shot powers is ok.The hover swift slotting combo looks good.
I intially was thinking of as i choose the next target for a mito from a low one to a higher one i wont have to jump up to target it and then drop back down losing target, i will hit hover and stay at mito/ target height. thats my plan anyway 
nearly the same build for me except 2 things
i've prefer took haste instead of build up.
damage of build up are cool, but between having healing flame really quickly, more aoe, and consume often, i prefer haste....
second things, i've took rize of phoenix instead of hover in your build.
WHy a rez for a tank? with 6 toggle and the time i use for put them on after a death, the sure death when your endurance equal to 0 (thanks carnaval...and other), it's the only way to came back quickly in fight with the stun effect
Hello all i posted this question on the guides section and realised it shouldnt have been there really, so i have reposted it here as this might be the right place.
I have a lvl50 Fire/Fire tank and need to respecc hover into his build for Hammi raids for reaching the higher mitos.
I posted one build already and had alot of great advice as how to change it around, so ive tried again.
your help again all would be appreciated as ive only one respec left and dont want to balls it up, this toon is on the test server so i can try it out up there first
Exported from version 1.5C of CoH Planner
http://joechott.com/coh
Archetype: Tanker
Primary Powers - Ranged : Fiery Aura
Secondary Powers - Support : Fiery Melee
01 : Scorch acc(01) dam(46) dam(46) recred(50) endred(50)
01 : Fire Shield damres(01) damres(3) damres(3) endred(17)
02 : Blazing Aura acc(02) dam(5) dam(5) acc(9) tntdur(9) dam(13)
04 : Healing Flames hel(04) recred(7) hel(7) recred(13) hel(17) recred(25)
06 : Combat Jumping defbuf(06) endred(11)
08 : Boxing acc(08) dam(11)
10 : Swift runspd(10)
12 : Taunt tntdur(12) tntdur(15) tntdur(15)
14 : Super Jump jmp(14)
16 : Health hel(16) hel(19) hel(19)
18 : Plasma Shield damres(18) damres(21) endred(21) damres(27)
20 : Stamina endrec(20) endrec(23) endrec(23)
22 : Burn dam(22) dam(25) endred(27) dam(29) recred(29) endred(31)
24 : Acrobatics endred(24)
26 : Tough damres(26) endred(31) damres(31)
28 : Combustion acc(28) dam(33) endred(33) recred(33) dam(39) dam(39)
30 : Consume recred(30) endrec(34) endrec(34) recred(34) recred(40) endrec(42)
32 : Fire Sword Circle acc(32) dam(36) endred(36) recred(36) acc(39) dam(40)
35 : Build Up recred(35) recred(37) thtbuf(37) recred(37) thtbuf(40) endred(45)
38 : Weave defbuf(38) endred(45)
41 : Greater Fire Sword acc(41) dam(42) endred(42) acc(43) dam(43) recred(43)
44 : Conserve Power recred(44) recred(45) recred(46) endred(50)
47 : Fiery Embrace recred(47) recred(48) recred(48) endred(48)
49 : Hover defbuf(49)
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01 : Brawl enhancement(01)
01 : Sprint enhancement(01)
02 : Rest enhancement(02)