Thanks Leon. I am thinking of going for AINP and then sponsoring my sister after I get my PR. One question: Is it true that I can sponsor her only after 2 years of getting my PR? I heard that there is a 2 year wait period before sponsoring someone thru family class and I couldn't find any clarification on AINP website.
You can not add your sister but if you get AINP and move to AB, you can sponsor her later under family class through the AINP. You can not sponsor your sister federally so if you want to keep that option open, you have to pick a province that has a family class on their PNP.
If your sister applied as a federal skilled worker in March, she will be processed under the new rules that haven't even been published yet. There is supposed to be a list of 38 professions, if hers is not one of them, she may not be able to use that immigration class. She can try to get a job offer and temporary work permit though and get PR later through PNP or CEC.