This is perhaps the easiest AA mission. Points go down in this one only when you or your opponent holds all three VPs.
Your strategy is simple: Take two points as quickly as possible and start building a strong presence at one, then the other (should be two at least, so the Germans don’t concentrate forces on your one VP). While building up your forces at the second VP, cap the 3rd.
There is little danger of losing if you’re playing on a map where you can put HMGs or schreck-upgraded Rangers in buildings to guard VPs. You should win 250 to 0. Having fewer than 250 points at the end will cost you the gold.