I'm currently testing alternative arcane specs to Icy Veins specs. I have been 57-3-11 the last months. Here are the reasons for me doing this:
1 - I'm currently hitcapped with just 3% from talents and my gear. This means that in usual tank and spank situations I use 11 talent points for pretty much no other gains than Icy Veins.
2 - In my experience Ulduar fights in general got more natural dps breaks where you can evocate without huge dps loss. The time saved when evocating on last sec on the veins is in other words less significant in Ulduar than in Naxx in my eyes. On top of that I got 20% haste in gear not counting buffs from my Embrace of the Spider and Scale of Fates and Heroism, so my evocation is already relatvely fast.
3 - My guild usually does AoE pulls like angry gorillas - sometimes this means super fast clear - other times it means loose mobs and the occational casualty. It sounds worse than it is - my point is: not a lot of coordination, strategy and marking - more like just tanks get what they can and everyone go all out AoE before all the mobs even reach the tanks and the tanks sometimes building aggro on the same target(s). In other words - sometimes a mob or two slips from the tanks and they have to move around a bit getting out of e.g. blizzards. In other words I think I too often waste both mana and/or dps with blizzard AoE and I too often find myself as either the n00b pulling the mobs out of the AoE with aggro (unless images are up) or nowhere near top 5 AoE dps.
So last raid I tried someting else. I maxed arcane subtlety (instead of just 1 point) and maxed world in flames and went all out AE spam with the occational PoM->flamestrike. To be honest I was somewhat surprised at the impact it had on
my trash damage. AE is in my eyes much easier to hit all AoEable targets with, even when the targets are spread a bit a part. And the AE threat is just a joke - even when taking into account that you are practically in melee range with the mobs I felt much safer, than I ever did when mainly using Blizzard for AoE. No cleaving Ulduar trash is also an important factor here by the way. Bottom line is that I like AE for AoE and find myself doing better with it than when using frost or fire AoE spells - and much better than I thought I would after looking at AoE theorycrafting numbers.
I also went magic absorbtion that raid, but to be honest I got very disappointed with the low amount of mana I got back from it - like 967 mana on a
full Mimiron fight and 6728 mana total on
all trash. Was I just extremely unlucky or is it really that bad for PvE? The partial resists of cause helps the healers a bit, but not worth the points for in PvE in my eyes at least.
So now I'm considering other places to put my talent points.
These points are the ones I think I will keep - leaving me 4 points to spare for e.g. student of the mind, incanter's absorbtion or even prismatic cloak (I think it at least would help the healers more than magic absorbtion). Since we have a disc priest in most of our raids, I think I will try maxing incanter's absorbtion out for next raid.
I was wondering if any other arcane mages actually tried doing something similar in Ulduar or if everyone still insists on 11 points in frost and Blizzard AoE due to Rawr telling them to? I at least want to experiment a bit more with this non-IV and non-blizzardbuild - to me it is at least both fun and surprisingly effective.