Craft shoulders.
Get a good rolled Stormcrow with 4% crit
Get 4% crit rolled Lacuni bracers, or craft you're own.
Consider get Zuni boots + Zuni ring with IAS for like 10-15 million. Normal Zuni ring can also be fine, its cheap.
Look up people's gear on offical forum, heres mine: 180 million
http://eu.battle.net/d3/en/profile/Djuntas-2390/
Edit: Plenty of ways to gear as CM - I choose to use 3 Zuni items (Chest, instead of tal Chest) at the moment, but Tal rasha chest is solid also. I just needet the all res.