Except that there is no such thing as ice secondary for controllers. 
So, you want to be allmighty powerful Dominator lord of death? Mind/Psi is excellent, but Fire/Fire has a lot of damage (Fire monkeys, FE, etc.) but it has a FPS debuff to your computer.
A powerful Dominator with a pet? Do you mean a powerful pet or powerful you? Gravity Control has the most powerful pet, (IMHO) and Plant Control hasn't got as powerful pet, but good control options. Mind has lots and lots and lots of control options, but no pet at all (with confuse everyone is your pet )
Good luck finding the Dominator that suits your needs.
Good guide here.
Oh, and my ice/ice is a blaster, not a troller 
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>
my doms fire/fire and he's pretty powerful, only downer is that the holds aren't great.
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Gravity Control has the most powerful pet, (IMHO)
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He's not exactly powerful (compared to fire imps), just very resistant.
Also, bonfire is no ice slick. Your enemies will be on the bonfire for about 1 tick before they bounce off, seeing bonfire is knockback and ice slick is knockdown.
I'm enjoying my mind/psi just now but i'm not big on pets anyway. If i wanted a pet i'd go fire/psi, the reason being i love those cheeky imps and psi seems very good for building domination.
My MA IDs:
Fiend Space: 211464
Ok i've recently chosen to roll a dominator, i have tried some of the sets but not all. I've got my Mind/Psi dom to around 6-8 and im kinda liking him. the only downer i have on him is no pets.. tbh i'd like a very powerful dominator WITH a pet.
I have a level 50 controller on Union which i adore, his name is Shiver and hes a ice/ice. I love builds like that. Now i would like something lik that, but not the same. I'd like to try maybe a fire/fire aproach, seeing as its villains, plus i think i'll like Bonfire as much as Ice Slick. What do you guys think? shall i enroll a fire/fire dom? or stick with my clever mind/psi, or even go with any of the other sets, (I'd like to avoid ice/ice seeing as i already gone all the way with it)..
Dark
Union-
HEROES
Shiver . Ice/Empath Controller
VILLAINS
Necromozone . Necro/Dark Miasma Mastermind
Tils - Bane Spider
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