Yes, you can do it both, actually it's what I did as well. but I don't think I will have any chance to get NOI unless OINP make a draw target with job offer only like they did in 2018, which the CRS score only around 350. However, you need IELTS with no less than 6 , ECA together with more than 1 years work experience in Canada, in order to create a EE profile in CIC, and it takes a quite long time to get ECA. so it's up to you whether you want to try both or just go directly with paper based.
Thanks hj2019