Was looking for some fire/dark posts and found this. Dont have any experience of the combo but I hate seeing peoples questions go unanswered. Try having a look at this:
http://boards.cityofvillains.com/sho...Number=5798580
btw. fire/dark looks like a nice effective combo.
My MA IDs:
Fiend Space: 211464
Hey Claire,
Fire/dark is awesome! 
And the guide Marquand linked too is a pretty nice one.
I put some suggestions for the slotting in your text so i'd save myself repeating all the lines again :P
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With the free respec from Issue 8, I thought I would have a go at rejigging Ghostfire. Currently lvl 32, and going okay, however starting to struggle against some villians. So wondering if everyone could look at the slotting, have I got this completely wrong? Thinking may have overkilled on fire half rather than dark half (betraying my blaster background) with slotting. This is the plan up to lvl 41, so any help most appreciated.
Name: Name Ghostfire
Level: 41
Archetype: Corruptor
Primary: Fire Blast
Secondary: Dark Miasma
---------------------------------------------
01) --> Fire Blast==> Dmg(1) Dmg(3) Dmg(11) Acc(15) Rechg(17) EndRdx(19)
01) --> Twilight Grasp==> Heal(1) Heal(5) Heal(29) Acc(31) Acc(31) Rechg(31)
02) --> Fire Ball==> Dmg(2) Dmg(3) Dmg(13) Acc(17) Rechg(19) EndRdx(23)
04) --> Darkest Night==> TH_DeBuf(4) TH_DeBuf(5) Rechg(7) EndRdx(34) no need for rechg here, better swap that for another to hit debuff
06) --> Tar Patch==> Slow(6) Slow(7) Rechg(9) Rechg(9) you want this up as much as possible. swap slow for recharge
08) --> Rain Of Fire==> Dmg(8) Dmg(11) Dmg(33) a rechrg in here would be nice
10) --> Fire Breath==> Dmg(10) Dmg(13) Dmg(15) EndRdx(29) Acc(33) Rechg(34)
12) --> Combat Jumping==> DefBuf(12)
14) --> Super Jump==> Jump(14)
16) --> Swift==> Run(16)
18) --> Health==> Heal(18) maybe take hurdle instead. gives you way better (combat) movement and health doesn't do much for someone with low hp anyway
20) --> Stamina==> EndMod(20) EndMod(21) EndMod(21)
22) --> Blaze==> Dmg(22) Dmg(23) Dmg(25) Rechg(25) EndRdx(27) Acc(34) take this recharge and put it in RoF?
24) --> Shadow Fall==> DmgRes(24) one or two endredux and does very nicely with more dam resis as well
26) --> Fearsome Stare==> Fear(26) Fear(27) Fear(33) Acc(37) to hit debuff on this is pretty nice. DEbuffing accuracy is one of the key elements in your tactics and this stacks nicely with DN. so swap the fear for one of those and maybe add a recharge
28) --> Howling Twilight==> Rechg(28)
30) --> Petrifying Gaze==> Hold(30) Hold(37) Hold(40) Acc(40)
32) --> Hasten==> Rechg(32) Rechg(39) Rechg(39)
35) --> Inferno==> Dmg(35) Dmg(36) Dmg(36) Acc(36) Rechg(37) might wanna swap the accu for another rechg. You want it up as much as possible and the base accu is already good. pop a yellow insp (or 2) before you nuke and all will be fine- at least for you. not for them 
38) --> Dark Servant==> TH_DeBuf(38) TH_DeBuf(39) Heal(40) swap the heal for another to hit debuff or add one of those
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I passed on the slot lvls, but in general i'd suggest you put the accu in first. Like you have it now they are all in the end. if you ever gonna malefactor you'll be hitting nothing but air 
Good luck!
Blue has said it all, but a couple of comments from my own (limited) experience with fire/dark (lvl 29).
- travel power: I took Hasten/SS which works great with Shadow Fall (makes pulling and ghosting easier). I find that the temp powers are enough for vertical movement (at least for now). If you do prefer CJ/SJ, I would try to squeeze Acro in there, but it might be tight.
- Aim: I respecced into this recently and find it very, very useful. Helps a lot with the herdin' n' burnin' and comes back quickly with Hasten. Probably more useful than Petrifying Gaze (which I might take later). I had to push Blaze back to 30 for this, but found it better to focus on the AoEs.
Enjoy the carnage!
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>
Pretty much concur with what's been said above - I think the little tweaks we all put on our fire/dark are what makes things each build a little bit unique.
- I've slotted a majority of my attacks with 2 acc; as you're checking to hit on each of your opponents with each of your AOEs I wanted to maximise my chances of hitting.
- For the above reasons, I dropped PG and took aim instead; unless I'm soloing something immune to fear like Nemesis I've not really missed it.
- Not sure if you've got a Patron planned out, but I've found that getting Power Sink from Scirroco's pool an absolute godsend, especially for AV fights when I'm running DN, SF, CJ and Acro.
- Agree with the debuffs in FS, and I've got it 2/2/2 slotted for accuracy, recharge and debuff.
Hope this helps - my fire/dark has been the most silly fun I've had with a toon for quite a while 
With the free respec from Issue 8, I thought I would have a go at rejigging Ghostfire. Currently lvl 32, and going okay, however starting to struggle against some villians. So wondering if everyone could look at the slotting, have I got this completely wrong? Thinking may have overkilled on fire half rather than dark half (betraying my blaster background) with slotting. This is the plan up to lvl 41, so any help most appreciated.
Name: Name Ghostfire
Level: 41
Archetype: Corruptor
Primary: Fire Blast
Secondary: Dark Miasma
---------------------------------------------
01) --> Fire Blast==> Dmg(1) Dmg(3) Dmg(11) Acc(15) Rechg(17) EndRdx(19)
01) --> Twilight Grasp==> Heal(1) Heal(5) Heal(29) Acc(31) Acc(31) Rechg(31)
02) --> Fire Ball==> Dmg(2) Dmg(3) Dmg(13) Acc(17) Rechg(19) EndRdx(23)
04) --> Darkest Night==> TH_DeBuf(4) TH_DeBuf(5) Rechg(7) EndRdx(34)
06) --> Tar Patch==> Slow(6) Slow(7) Rechg(9) Rechg(9)
08) --> Rain Of Fire==> Dmg(8) Dmg(11) Dmg(33)
10) --> Fire Breath==> Dmg(10) Dmg(13) Dmg(15) EndRdx(29) Acc(33) Rechg(34)
12) --> Combat Jumping==> DefBuf(12)
14) --> Super Jump==> Jump(14)
16) --> Swift==> Run(16)
18) --> Health==> Heal(18)
20) --> Stamina==> EndMod(20) EndMod(21) EndMod(21)
22) --> Blaze==> Dmg(22) Dmg(23) Dmg(25) Rechg(25) EndRdx(27) Acc(34)
24) --> Shadow Fall==> DmgRes(24)
26) --> Fearsome Stare==> Fear(26) Fear(27) Fear(33) Acc(37)
28) --> Howling Twilight==> Rechg(28)
30) --> Petrifying Gaze==> Hold(30) Hold(37) Hold(40) Acc(40)
32) --> Hasten==> Rechg(32) Rechg(39) Rechg(39)
35) --> Inferno==> Dmg(35) Dmg(36) Dmg(36) Acc(36) Rechg(37)
38) --> Dark Servant==> TH_DeBuf(38) TH_DeBuf(39) Heal(40)