After Hcv, skip dcp lvl 1, and start from lvl 2. After dcp, go for Irodov. I won't recommend Krotov, Irodov would be more relevant.
Ideally, one mechanics chapter should not take more than 2 weeks,along with studying the other 2 subjects. However, your sense of understanding and feeling about the chapter must dictate how much time you give to a chapter.