Fire/kin is a good example of a build which works better in 2 steps (i.e. up to 28-30, then respec). Partly because it's quite endurance heavy, so some powers can't really work properly before SOs, also because some people prefer to use IR as their sole travel power.
This is how I would play fire/kin up to 30:
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: 31
Archetype: Controller
Primary: Fire Control
Secondary: Kinetics
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01) --> Char==> Acc(1) Acc(3) Hold(3) Hold(5) Rechg(5) Rechg(11)
01) --> Transfusion==> Acc(1) Heal(7) Heal(9) Heal(9)
02) --> Siphon Power==> Acc(2)
04) --> Fire Cages==> Acc(4) Acc(7) EndRdx(31)
06) --> Hurdle==> Jump(6)
08) --> Air Superiority==> Acc(8) Dmg(13) Dmg(13)
10) --> Siphon Speed==> Acc(10) Rechg(11)
12) --> Swift==> Run(12)
14) --> Fly==> Fly(14) Fly(15) Fly(15)
16) --> Flashfire==> Acc(16) Acc(17) DisDur(17)
18) --> Cinders==> Acc(18) Acc(19) Hold(19) Hold(21) Rechg(21) Rechg(25)
20) --> Stamina==> EndMod(20) EndMod(23) EndMod(23)
22) --> Speed Boost==> EndMod(22)
24) --> Hasten==> Rechg(24) Rechg(25)
26) --> Hot Feet==> Dmg(26) Dmg(27) Dmg(27) EndRdx(29) EndRdx(29)
28) --> Inertial Reduction==> Jump(28)
30) --> Assault==> EndRdx(30)
Some comments:
- AS is a nice attack to use in the low levels with containment. You can then use Fly to move around for a while since you can't really get away with siphon speed as your only travel power.
- Skip Repel. Really.
- Hot Feet is great, but hard to use before SOs.
- Fire Cages can be slotted for damage in the lower levels, but afterwards it's mainly used for group containment, and in tandem with Flashfire.
- ID is a great buff, but not a priority imho. Depends if you want a more team-focussed buffing build.
- Bonfire: try it and see. Not a big fan of kback as a form of control, but has some uses.
After 30 I would go for something like this:
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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: Controller
Primary: Fire Control
Secondary: Kinetics
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01) --> Char==> Acc(1) Acc(3) Hold(3) Hold(5) Rechg(5) Rechg(7)
01) --> Transfusion==> Acc(1) Heal(31) Heal(31) Heal(31) Acc(34) Rechg(46)
02) --> Fire Cages==> Acc(2) Acc(7) EndRdx(34)
04) --> Siphon Power==> Acc(4) Rechg(37) Acc(43) Rechg(48)
06) --> Hurdle==> Jump(6)
08) --> Hot Feet==> Dmg(8) Dmg(9) Dmg(9) EndRdx(13) EndRdx(13) Slow(46)
10) --> Hasten==> Rechg(10) Rechg(11) Rechg(11)
12) --> Siphon Speed==> Acc(12) Rechg(34) Rechg(43) Acc(46) Rechg(50)
14) --> Flashfire==> Acc(14) Acc(15) DisDur(15) DisDur(17) Rechg(40) Rechg(40)
16) --> Assault==> EndRdx(16) EndRdx(17)
18) --> Cinders==> Acc(18) Acc(19) Hold(19) Hold(21) Rechg(21) Rechg(25)
20) --> Swift==> Run(20)
22) --> Stamina==> EndMod(22) EndMod(23) EndMod(23)
24) --> Speed Boost==> EndMod(24) EndMod(25)
26) --> Tactics==> TH_Buf(26) TH_Buf(27) TH_Buf(27) EndRdx(29) EndRdx(29)
28) --> Inertial Reduction==> Jump(28)
30) --> Smoke==> Rechg(30)
32) --> Fire Imps==> Acc(32) Dmg(33) Dmg(33) Dmg(33)
35) --> Transference==> Acc(35) Acc(36) EndMod(36) EndMod(36) Rechg(37) Rechg(37)
38) --> Fulcrum Shift==> Acc(38) Acc(39) Rechg(39) Rechg(39) Rechg(40)
41) --> Power Blast==> Acc(41) Dmg(42) Dmg(42) Dmg(42) Acc(43)
44) --> Temp Invulnerability==> DmgRes(44) DmgRes(45) DmgRes(45) EndRdx(45)
47) --> Power Boost==> Rechg(47) Rechg(48) Rechg(48)
49) --> Hover==> Fly(49) Fly(50) Fly(50)
Some comments:
-When levelling, you migh consider the Fire Epic first to get the nice AoE attack with Fireball, and then respec into Primal (or Psi).
- You won't need Conserve Power with Stamina and Transference.
- You should take Flashfire much earlier. It's your main tool along with Fire Cages (more useful than Cinders).
Hope some of this helps! 
CoX 50s: <ill/rad> <ice/ice> <fire/kin> <grav/sonic> <ice/storm> <earth/kin> <kin/elec> <cold/psy> <thugs/dark> <fire/dark> <dark/elec> <night widow> <EM/ninj> <mind/icy>
Thanks Okton, good points duly noted.
Because ive not had the game for a week been working on my next 4 builds on work PC.
Splitting it into 2 (or 3)is something i usually do and to be honest by the time i get this toon to 30 issue8 will be out.
thanks for the help.
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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: Dfine
Level: 50
Archetype: Controller
Primary: Fire Control
Secondary: Kinetics
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01) --> Char==> Acc(1) Hold(5) Hold(7) Rechg(29) Dmg(42)
01) --> Transfusion==> Acc(1) Heal(3) Heal(3) Rechg(21) Rechg(43)
02) --> Siphon Power==> Acc(2) Acc(5) Rechg(7) Rechg(43)
04) --> Fire Cages==> Acc(4) Dmg(9) Dmg(9) Dmg(17)
06) --> Hurdle==> Jump(6)
08) --> Hasten==> Rechg(8) Rechg(11) Rechg(11)
10) --> Siphon Speed==> Acc(10) Rechg(13)
12) --> Hot Feet==> Dmg(12) Dmg(13) EndRdx(15) EndRdx(15) EndRdx(17)
14) --> Swift==> Run(14)
16) --> Increase Density==> Range(16) DmgRes(19) DmgRes(19) Rechg(21)
18) --> Repel==> KB_Dist(18) KB_Dist(43) EndRdx(46) EndRdx(48)
20) --> Stamina==> EndMod(20) EndMod(37) EndMod(46)
22) --> Speed Boost==> EndRdx(22) EndMod(23) EndMod(23)
24) --> Cinders==> Acc(24) Hold(25) Hold(25) EndRdx(27)
26) --> Bonfire==> Dmg(26) EndRdx(27) EndRdx(29) Dmg(33) Dmg(34)
28) --> Assault==> EndRdx(28) EndRdx(31)
30) --> Tactics==> EndRdx(30) EndRdx(31) TH_Buf(31) TH_Buf(33) TH_Buf(46)
32) --> Fire Imps==> Dmg(32) Dmg(33) Dmg(34) Acc(34) Rechg(36) Acc(45)
35) --> Transference==> EndMod(35) EndMod(36) EndMod(36) Acc(37) Acc(37) EndRdx(40)
38) --> Fulcrum Shift==> Acc(38) Acc(39) Range(39) EndRdx(39) Rechg(40) Rechg(40)
41) --> Conserve Power==> Rechg(41) Rechg(42) Rechg(42)
44) --> Temp Invulnerability==> DmgRes(44) DmgRes(45) DmgRes(45)
47) --> Power Boost==> Rechg(47) Rechg(48) Rechg(48)
49) --> Flashfire==> Dmg(49) Dmg(50) Dmg(50) DisDur(50)
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01) --> Power Slide==> Empty(1)
01) --> Sprint==> Run(1)
01) --> Brawl==> Empty(1)
01) --> Containment==> Empty(1)
02) --> Rest==> Heal(2)
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Be kind..