I did play with some Diablo II Skill Planner and results were damn good.
With my Blizz gear I get 49 lvl blizz (with Blizz ormus), other maxed synergys (Cold Mastery, Ice Blast lvl 46). My gear gives 26 extra skill points (Have 9x Cold sks and bunch of others) so dmg will be huge even if skills isnt maxed.
So Diablo II Skill planner told me that Blizzard (lvl 49) will give me 14130-14598 dmg (Havin Blizzard, Ice Blast, Cold Mastery maxed, Glacial Spike and Ice Bolt will be lvl 27 with only 1 point added in both)
And these does not even include -cold res and % cold dmg items (My DF 29% + NW 20% + Ormus 20% = 69% more cold dmg)
So this would be damn huge and enough I think, precast I would only need to change (with 20 TK and 15 ES): +3 light amu, +3 circlet, ES ormus and Memory 9es
I'm really hoping this Diablo II Skill Planner is kidding me, because this would be more than enough.