Ice if you like fighting large mobs. Mace for single hard targets like AVs. Sleet and PR both have the same cast time and while PR has a longer debuff duration, Sleet is AoE. Additionally, Sleet+Ice Storm have more -speed/recharge to stack with your psi powers. A plus for Mace would be its shield also granting energy defense for you to build on so softcapping s/l/e would be quite feasible and useful for things like incarnate content.
SG: Guadians of Paragon - VG: Paragon's Darkness
The Usual Suspects: Fimboolvetr (Icer Tank), Tsukiyomi (Mind/Psi/Ice Dom), Smiting Dragon (Dm/Sr Scrap), Widow Mortis (NW)
Up and Comers: Ameterasu (Km/Reg Scrap), Arrhymian (Elec/Nin Stalk), TDMKII (Bot/Traps MM)
Unquestionably, you should go Ice. Unless you just really like mace.
My elec psi uses:
dp/fences/sleet/fences/storm/psiwave
rinse and repeat. I have an ungodly recharge, but the attack chain flattens mobs of +2/8 in 2-3 seconds, no bosses. Bosses you can just poke with probe/tk to finish them off. The chain has a mix of damage, so resistance doesnt really come into play. I need to point out, I have pyronic? interface at rare, so I do hefty damage with each application of fences. Without interface, it just does 15 damage. With interface, it does 63 damage, and recharges in less than 2 seconds with a near instantaneous reapplication.
Without the ice app, I would definitely not be smashing as much.... Sleet/storm just stack extremely well with psiwave.
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Hew in drag baby
I've been rocking Ice for the longest time and while sleet is awesome and Ice Storm is another nice AoE I'm just wondering if I made the right choice.
Sleet gives me -30% res for about 1/2 the time whereas P-Ray would give me 18.8% perma, plus a better attack than sleet I suppose. The shields are the same so that's no big deal. Then I'd have either A) A decent AoE (though I already have my AoE immob and PSW, so I wouldn't necessarily NEED it though it is nice) or B) Either another AoE to round out my attack chain, or an OHCRAP power if I wanted (that could give me more HP and 2 more slots, but that's not as big a deal)
As far as incarnate stuff I'm rocking Spiritual for the rech and making Drain Psyche better, Reactive, Warworks, and leaning heavily towards the hp/heal Rebirth for my Destiny slot.
Thanks for any ideas and suggestions.