AH is the fastest to get all plans    its so cheap now 
but personally i completed all plans from drops @ trade with players during my run
fastest run imo:
Act 3 - Heart of Sin:The Second Heart Quest > Start at Crater 2 to get stack > Tower Cursed 1 > 2 (u might skip crater 2 n start TC 1 if u think can get 5 nv from TC 1 & 2) > kill Cydea > Core > Kill Azmo > carry nv to Act 4 > Kill Iskatu > run all the way to Library to kill Rakanoth ... total of 3 bosses that can drop plans
MP wise. i think the highest MP u can do at good speed with minimal death is the best choice.

  burned quite some perf sq emerald there 

Patch 107, A2 keywarden is getting smarter now.

It will chase after player. Bad for DH.

omg...3.4 attack speed >.<

Last night i crafted 20 Str bracer and got this:

http://us.battle.net/d3/en/profile/Corrosi...72/hero/4261989

276 str
43 Dex
32 Arcane Resistance
77 AR
17% MF
6 CC

WHY NO VIT!!

and then 2 days ago i crafred amulet:

210 str
39 poison resist
221 Armor
98 CD
9 CC
HP Regen 353

no vit again

but atleast both are upgrade for me

I'm just focusing on trying to get a good Dex vit ar 6.0cc bracers.. so hard to get. Once in a while I'll do some ammy. I think dps wise I'm covered, just missing that one item which is my mempo with CC.