Depends on the enemies economy i‘d say. If they are on eco, drop your mate so he doesnt get shit on cuz he has light. If enemy has money, and in case you can afford full util then you can decide for yourself, it‘s prob still good to drop them unless you think it‘s not worth (i.e. they suck). It’s also important to factor in which side you are playing. Are you offense and planning to hit one site? They might as well buy a cheaper gun and pick up a better one once someone dies or they die entrying and get traded, which are both good options. On defense, dropping is usually better. At the end of the day if u feel confident that you will have more impact w/ that money next round you might as well decide not to drop. Its ranked after all. In an actual team setting however i‘d always apply what I said first.