tuning a 0.6mm nozzle

Hi I have just move from a 0.4mm cht nozzle on my rapido to the UHF 0.6mm nozzle and I am tuning the bottom and top layer . The bottom layer squish still shows some lines on the outer edges would I need to adjust z height a bit lower to get it better? And also the top layer aren't looking perfect so I am wondering whether I still need to work on the EM maybe lower a bit more what do you reckon ? Thank you