From those sets I have only tried Mind Control in PvP (lvl 50 Mind/Psi) and it´s really nice. Confusion and fear is just too much fun and Telekinesis is a great way to tell a wannabe-hero that you don´t want to hug him. 
If it has eyes, you can blind it, if it has blood, you can make it bleed, if it has a mouth, you can make it scream.
I don't play much PvP, but I currently have a level 30 Grav/Ice Dom and I can say it's a very nasty combo indeed.
Any of them will be awesome in PvP with PB Aid self all of them have advantages I personally have an Ice/Ice I'm leveling up and I've seen it used very effectively 
thePhilosopher Martial Arts/Regen/Fire Scrapper
theRegulator Empathy/Energy/Soul Defender
Total Inertia Ice Blast/Kinetics/Psy Corruptor
Total Inferno Ice Blast/Thermal/Leviathan Corruptor
hmmm ive found my ice/ice great for pve. i can solo missions easily with group sleep (flash freeze), ice slick and glacier (group hold) used to control mobs while beatin down idividually. and also found groups like ice slick for slowing attack rate etc. i find most people have good resistance in pvp though to cold specially as most pvp i go into has lots of scrappers about. im wanting to respec in more slots on aice slick though for recharge as it does seem to detoggle :P
from persona experience mind control in pve is strong but can be annoying for teams along with gravity as theres alot of throwing npc's about involved which means stalkers and brutes running all over the place lol. ive also seen that mind doms are very good in PvP and heroes tend not to like playing against them. guess thats because of low amount of people with resistance to psionics.. dont have heroes btw thats just an assumption :P
i think the philosopher above had a good point with the heal self for pvp as it aids the squishyness. was also thinking about invis and phase shift for helping assure first hold vs troller and an escape when them nastyscrappers hit u with imob. other options could include fighting for less squishyness and super jump maybe for imob resistance and acrobatics to get a possible uper hand on trollers again... i personally took fly just coz i like to use it as a defence and find it fun, the slow after attack isnt great though when a speedy blokey hits u with imob...
ye in conclusion buddy its up to you, look over powers and choose what u will find fun, i think choosing pool powers is the hardest as i just wanna take them all lol
Good Morning everyone,
currently i am playing a Ice/Ice Dom in the low levels. He is definetly fun. Up to now, I have mostly focused on trollers, so im quite familar with the primaries. However, I'd like to hear your opinion. My first thought was that Ice/Ice builds a great concept. But then there I probably the lease symbiosis consiering these three primaries, as your Main Controllpower Ice Slick is not affected from Power Boost.
So I thought that Grav and Mind would feel much more powerful. In PvE and PvP the best performance would probably come from Mind, if confuse is affected by PB, closely followed by Grav.
However, the slows in Grav would probably as well make the Grav/Ice an awsome PvPer.
So what would you think is the overall better PvPer (in PvE I think its Mind/Ice in big groups and Grav/Ice on single targets). Or have I overseen something from the Ice/Ice that makes it most valuable in PvP?
Cheers