I've just used my favourite elastic waist trousers (New Look 6216) and my favourite knit top (New Look 6735) with a few alterations.
For the trousers I added inseam pockets instead of the angled pockets in the pattern as I felt they would work better in this very soft viscose knit.
The waistband has a combined elastic and drawstring waistband (using a shoelace for the drawstring part). To support this I interfaced a small part of the front of the waistband and made 2 buttonholes for the shoelace ends to come out and be tied.
For the top I sewed as per the pattern, although I added cuffs to the 3/4 sleeves in the print. Both the print (viscose knit) and the plain (cotton mini rib knit) have poor recovery so I inserted elastic into the neckband as I constructed it.
The hems are done on the twin needle on the sewing machine. Hopefully the neckline and hem will look a little better after after pressing.