That orb is a steal because of its APoC. Pair it with chantodo wand, you can equip Mempo.

I think there is a wrong set up of passive skill.
Why conflagration? As you don't use fire damage skill.

u can try using prismatic armor instead of shocking aspects to buff ur armor n AR .. it definately help my wz in terms of survivability ... with my just average dps i dont gain much from shocking aspect
imo as a cm wiz u dont need LS from blood magic.. instead get more LoH cos WW proc LoH quite nicely to sustain ur health pool .. i hv meteor to deal with ranged mobs @ those annoying double/triple ground effect elites which i cant get close to w/out dying .. i personally use comet rune to get most from cold blooded but since u r using Conflagration passive, molten impact is the obvious choice.

wahh 2890 no more DH? GG!! come and play US server la. more fun..   

D Shard adds to ur Edps and doesnt show on Pdps eg Shocking aspect.
no it doesnt stack, u have to keep casting (DShard 1 cast = 1 hit, chain reaction stackable = 1 cast = 3 hit)

use Meteor instead of blizzard as it hits harder, but u cant spam much as it is costly unless u are hitting big mobs)

xtra fast Es can escape or use their skills as even a slight delay in freezing them is enough

telepothead Es oso can escape if there is a dlay in ur freezing

your ingame ping ms oso have effect on freezing efficiency (make sure its green bar not yellow/red)

DShard will xplode even b4 the time is up if u recast, if  u r hit by mobs after the 1st cast xplodes and before the 2nd cast then it will not absorb incoming dmg.

Chain reaction is highly stackable, the answer to ur Q is if u recast twice before the 1st xplodes it stacks like lining up in a queue. u can test this out by just using WW + EB only, without frost nova n DSkin to save up more AP to cast/test EB on white mobs especially big white mobs.

I do it too wen im lazy to freeze and thrash cant kill me so no DSkin either and repeated cast of EB makes it looks like a machine gun going off.

trifec or bifec?

anyways, if u change ur amy to a trifec amy u can easily breach 200k dps
cm wiz with 200k dps or above is godlike

haha i oso dont have trifec leg rings. true playing cm wiz is very hard to gear cos alot of micro managing
damn  high speed + cc is mandatory.

well, myself is using poormans gear so i rely alot on LOH + try to anticipate what would happen eg frozen + vortex + plague Es (hence Telepot is essential, as we cant always rely on move speed to get out of trouble and to jump in to freeze b4 the E can use their skill)

I will always try to freeze Es as tighly packed  & as fast as i can cos i dun want those Es to use their skills (especially: frozen), but plague/motlen/ arcane is ok cos LOH can fill my hp globe but i get disrupted wen there r someone in the party with knockback skill.
most cm wiz cant afford so just have to put up with watever gear they have + much lower ehp than u.
I ony have 600+ AR, im sure by know u have more AR than me.

Ur gear is already damn impressive as u have high hp + high dps + high armor even without energy armor) but ur amy should be the easiest to upgrade as it can give u additional CD (80% >)   (crafting 1 would be gud if u are not in a hurry  )

im using inna pants, yea damn ugly but i use vanish potion so i can see her smexy thighs. 

700LOH is adequate, any higher is a bonus. u can pop some ET on far away white mobs to gain additional LOH unless u r toking bout single target.