iirc base ice powers do -20% recharge/slow debuff, making your's do nearly 30%.So basicly u only need 3 powers to hit cap -recharge/slow, normaly u need 3-5. (it only last 10 secs). However, putting the snowstorm on with slow slotted does this job in 1 blow.
U can try both on the testserver, see wich one you like more. As its nearly 40% recharge difference, might be bit annoying.
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(50)MaceX/(50)Encore
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Hmmm good point, although I am at nearly 50% recharge through my other set bonus'. Now sure it would make much difference. Does any1 actually slot for slow and how do they find it?
Slotting for slow should only affect the movement speed component of the slow, not the -recharge. You'll do far, far better simply by using Power Boost before you fire off an Ice Blast salvo.
For ranged attacks I'd usually go with 5 level 40 Decimations and the level 50 Devastation 4x.
80.15% Acc, 96.53% Dam, 61.98% End, 80.15% Rech
+6.25% Recharge
+2.25% Maximum Endurance
+1.13% HP
+2.75% Immob Resistance
YMMV, my Blaster builds are +recharge junkies.
Awww silly me.. totaly forgot powerboost. Strong point there Maelwys 
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Ah cool, cheers for the info man.
Does slotting slows into my ice attacks on my ice/em make it worth while? I have been playing with IOs and have come up with this:
Level 1: Ice Bolt
(A) Thunderstrike - Accuracy/Damage/Endurance: Level 40
(3) Thunderstrike - Damage/Endurance/Recharge: Level 40
(3) Devastation - Accuracy/Damage/Endurance/Recharge: Level 40
(5) Devastation - Accuracy/Damage/Recharge: Level 40
(5) Tempered Readiness - Accuracy/Damage/Slow: Level 40
(7) Tempered Readiness - Damage/Slow: Level 40
Which gives these values:
Acc: 90.86%
Dam: 97.73%
End: 36.19%
Rec: 55.49%
Slow: 43.43%
But also gives 3.5% recovery and 12% regen increase through set bonus'.
Or I could use my convetional slotting to achive this:
Level 1: Ice Bolt
(A) Thunderstrike - Accuracy/Damage/Endurance: Level 40
(3) Thunderstrike - Accuracy/Damage/Recharge: Level 40
(3) Devastation - Accuracy/Damage: Level 40
(5) Devastation - Damage/Recharge: Level 40
(5) Devastation - Accuracy/Damage/Endurance/Recharge: Level 40
(7) Devastation - Accuracy/Damage/Recharge: Level 40
Which gives these values:
Acc: 94.24%
Dam: 98.46%
End: 36.19%
Rec: 78.65%
Which gives me:
Thunderstrike
(Ice Bolt)
+2% Recovery
Devastation
(Ice Bolt)
+12% Regeneration
+27.1 (2.25%) HitPoints
+3% DamageBuff
So what I really want to know is will slotting the slows make any real difference to the person Im hitting recharge time and run speed? Bare in mind this is a PvP build. Any thoughts or advice on other ways to slot it?