I choosed to use another lace pattern:

• Round1: K2tog YO all around
• Round2: K around
• Round3: YO SSK all around
• Round4: K around

(when working back and forth purl the even rows)

My gauge was correct in stockinette but way too loose in lace pattern, that’s why my sleeves were too large.
And, as I found it impossible to do decreases evenly with the lace pattern, I decided to work the sleeves together with the body.

• I had worked in the round until armholes, so I ripped back to there.
• I Provisional cast-on 41st before and after the front stitches and left the back st on waste yarn
• worked short rows every 8 st to shape the sleeves 5 times
• shaped the neck and shoulders
• did not bind off but CO 42st between the shoulders to work the back top-down
• closed to waiting back st with mattress stitch