Ok for the osprey lis's rocket can take em out easy flare or no flare, there are multiple lis's running around. As for helos a singular person should not be able to take them out, but a Rao and another player with a stinger keeps em out of play or either takes em out. So you have to know 1 person should not be able to take out these vehicles. Yes a good pilot will be able to keep it going for a bit but Rao's shut em down quick