From your current gear i would say getting a Witching Hour would give u most dps boost (from ias & chd). However to replace what your current belt provides in terms of EHP, u need a very expensive WH (intel + vit + AR). If you are willing to sacrifice some ehp for dps boost i am wiling to sell u my WH for 20% below AH price  (12.5M cheapest in AH so far ive checked, i could let go of mine at 10m  )

my WH stats:
100 intel
+39 lightning resist
9% ias
38% chd
+19% GF
+7 pickup radius

wow nice....
and cheap also

ok henry sell ur WD mia kidney liaw..

no need 0cd for dog ...
now with skill mix also feel like 0cd dog liaw..

see mobs..throw fire bomb..throw grasp...throw harvest soul...booom c4...
DR mobs also die...........
along with me..

if u use boom they came 1 shot mia...boom u see ur screen red liaw...the next thing u know ur gargantuan whack the mobs..."You are dead"

Thanks bro! but hor...Kena unlock my account first. kena lock when I tried to purchase heart of the swarm  suspicious log in from another location. I have a feeling my CD KEY is back at my house in Puchong.(I'm at PJ now).
AIHHHHHHHH

Alright bro. but won't be playing this weekend. Got wedding shoot to do kat Malacca monday.

My D3 ladies(Wiz, Monk, and WD) have to wait muahahaha

Been farming mp0 with around 80k dps

Sunkeeper x2 + HF ring x2 (follower)

Results are quite good! Didn't calculate time per run but seeing more greens

Yeah this is what ive been doin for some time alrdy    2 x Sun Keeper = arnd 50% MF (which equates to 2 mp level) so basically u can do mp0 with same MF as doing mp2 but way faster killing speed (benefits GF/GI, CoL, Jaunt/Stalker combo). I run mp0 with 84k dps only but still deliver frequent crits with Acid Rain which melts white mobs fast.. elite packs are dealt with some Bears @ Sac when mana is low.
This morning's speed run alrdy gv me few legs with IK chest & Shen Long fist being "worthy" drops 
Craft a vitality HF ring and hope for a life%, MF & GF rolls (another roll can be either str, armor @ AR) for the best HF ring on Templar follower.
The best setup for Templar follower for MF is: Sun Keeper + Stormshield with 20% MF + puzzle ring (for that xtra gob drops) + vit HF ring + ammy with high MF & vit ... relic try to get high vit + armor/ar/block chance.
I switch to Azurewrath + Star of Azkaranth ammy for higher mp key runs so my Templar can freeze elites frequently (coupled with Garg/Bruiser stun ... it help me keep tough elite packs in place while i spam bears on them)
I hv xtra Sun Keeper if u want to borrow    currently using 1k dps open socket + high intel/vit Sun Keeper for myself & a LoH Sun Keeper for my Templar 

[attachmentid=3217296]

Just to get Henry salivating    haha

i dont think i'll be doing mp10 for now ... need to increase my AR & Armor before i attempt mp10 ... maybe a higher dps LS Skorn is needed as well.. my experience with mp9 uber runs with some LYN members taught me that mp10 is suicidal for me now haha.
the problems i foresee a WD attempting mp10 ghom are .. going OOM due to huge health of mp10, pets dying fast due to poison (unless u stack life regen + thorns on gear & use Fierce Loyalty passive) ... big dmg attack such as bears will make u go OOM while low dmg attack such as splinter @ RoT will take forever to kill mp10 Ghom.

Snake to the face is nice especially if u have high attack speed .. that can keep Ghom stun.
Jaunt u might want to change to Honored Guest for mana regen so can spam Bears more.
Mass Confusion wont be effective bcos its meant for large mobs ... even if u want it for stun, the 60 second cooldown for a 3 sec stun wont make it a good choice.
Slam Dance can be good but i dont see a 20% increase in ias % 30% dmg for 20sec (while hv to wait another 100 sec to be able to use it again) will make a big difference.
Frightening Aspect is a good choice since it increase Armor.. however do u expect to get hit by Ghom in the 1st place?    most of the time u will get dmg from his poison cloud not melee attack.

Suggestions:
U need to deal huge dmg to kill Ghom ASAP .. Bears is the obvious choice but u need some kind of attack to supply u mana ... for this i would suggest Haunt/Draining Spirit .. Haunt is a click n forget attack .. DoT for 6 sec .. DS rune will return u 20.4 mana per sec which totals up to 122 mana over 6 sec.
Another big dps attack to supplement Bears .. Wall of Zombie/Pile On is a good choice ... 800% wpn dmg is HUGE and getting PO to hit Ghom would be easy as he is a large target .. PO then Bears while waiting for cooldown on PO

well, we need your Ghom mp10 kill vid, hehehe.

done this at first attempt... http://www.youtube.com/watch?v=bWuInPWOwPo&feature=youtu.be

Always forgot to activate manitou and to stand nearest ghom 

Starts : 0:09
Finishes : 6:07
Duration : 358 seconds

my passive skill
- spiritual attunement
- zombie handler
- jungle fortitude

just follow advice from all sifu here before this that wd need more AR
so my current AR is +-900 and LOH +-1800
http://us.battle.net/d3/en/profile/popo-6986/hero/25212634