Harvester

The Harvester is the go to UFO if you are having resource problems. It is the most effective UFO in the game for gathering Alien Food and Organs making it extremely valuable for both maintaining your fleet and producing ground troops. It represents a massive jump in harvesting mission efficiency, so much so that even a single one of these UFOs can maintain a massive fleet. Since they are so good at harvesting, they have reduced stats in other categories compared to the Scout UFOs. Harvesters should not be used for research or infiltration missions, and should be kept harvesting at all times. If you are in desperate need for technology progress, the Harvester actually has a good Abduction value, making it a capable choice.

The Harvester is not only the go to for resource gathering, it is also capable of defeating human interceptors. While capable of doing so they should not be focusing on hunting human aircraft as there are other UFOs more equipped for the job. Human interceptors can still shoot down the Harvester so don't get too overconfident.