One high level 'trick' to help guide an investor on which names to remove can be to act as though you are going to purchase a stock as a brand new position. Would you buy it 'today'? If the answer is no, it is probably a good sign that it is a sell candidate. Also, if positions are small in a portfolio it often means the investor does not have a whole lot of conviction on the name and it also won't be contributing much to the portfolio, making it an easy name to remove as well.
Outside of this, we would maybe look for overlap in exposures or factors and look to remove names that help to reduce an overweighting to any single type of exposure.
We might have less considerations at the sector level specifically but we would maybe just look for companies that are growing and have quality balance sheets while the valuation has not gotten too far ahead of itself.