I would probably say, personally Mind / Fire. Who cares about FoTM anyways, and Telekinesis is so worth it. That and I don't like Fire Control, might be ok in Arena duals (I mostly do zonal). Not sure how much this helps, but I would definitely go Mind / Fire.
Hiya,
Im not much experienced in fire/, i have only played it to mids 30s, but i would give u some advice:
1) If u want a good PvE toon over all his career, go for fire/fire. Ur dmg will be nice, the best one for doms... FE is awesome, believe me. For PvP, well, it isnt the best one, but its a nice one... Bonfire will permaknock ur enemy once detogled, fast animation with ur ST hold... Good one mixed toon...
2) Mind/Fire is more pvp oriented, IMHO... Yeah, mind is awesome in control, but with Powerboost in ur secondary, is even better!! U still will be awesome in pve, but not so darning good as fire/fire... But in pvp, lot of tools, TK, a nice burst dmg, a ranged detoggled... all u need for pvp is in that combo...
Well, u can choose now u know it, which way would u like?? The best overall dominator, or the best in one aspect?? Thats up to u 
But, overall, have fun, and enjoy the journey to 50 
Cheers.
Hi there, after getting a bar from 50 on my Brute, I thought I'd try something new and go with a Dominator. I've decided I would quite like to go /Fire, but can't completely decide on the Primary. Concept wise, I have narrowed it down to either Fire or Mind.
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Not being an expert at Dominators (and not having Mid's currently on this computer...) I would like a bit of advice. However, I have weighed up the pros and cons in my head:
FIRE
Pros:
- Imps: Very important, a large damage boost.
- Imps: PvP: Help in a one on one situation if you are mezzed, as they keep on going.
- Arguably better in PvE and solo play
- Get a (all be it small) extra boost of damage with Fiery Embrace from /Fire
- Get immobilise powers
- Get AoE stun, working as another big Mezz
Cons:
- Not much to help keep you alive
- Doesn't really come "alive" until level 32
- More resisted than Mind (damage wise)
- Less accurate than Mind
MIND
Pros:
- Very accurate
- Psionic (highly unresisted) damage
- Telekinesis: Acts as an extra hold IIRC, works situationally well in PvE, very good in PvP
- Ability to Confuse, working well in PvP and PvE
- Ability to AoE or ST sleep, working well in PvP and PvE
Cons:
- No pets, so when mezzed in PvP your damage output stops
- Many powers go to waste in a PvP build, eg Mass Confuse, Total Domination
- [It's FOTM!
Basically, the major issue I'm worried about (things you can't work around with slots for example) is the balance between Telekinesis and Imps, two majorly important powers.
So basically, PvE, levelling, and PvP, which would everyone say outweighs the other in each situation?
Thanks!