My answer is beased on TSC

VSC is fastest on and NSC is the slowest one
>>1. 去公司工作；
If go LC by PERM and no retrogress problem, 2.5 years.

>>2. 在美國大學當Faculty;
If go LC, 2.5 years

>>3. 在美國大學作博士後。
If NIW, 1.5 years. If OR, 2.5 years

>>聽說在在美國大學當 Faculty 可以申請第一類優先,
No, Even in company you can go EB1.

>>哪些類型大學的Faculty 申請綠卡可以申請第一類優先？
Any university. USA does not have discrimination
Harvard is not easier than a small state Univ. EB1 only sees what you are doing

>>College 怎麽樣？
The same as Univ

誠心請教，謝謝！