Hey. I dont have the Endure achievement yet (cause the only team I can get together includes a BK who rushes the covenant to much)
so I'm calling on random people i've never played with before who are obviously better
send me a friends request and a voice message if you want to help
I already know a highly effective way to get the achievement. so dont say "OMG I saw IGN do it on that place with all the vehicles!" Its easiest on winward, no one leaves the room and everyone guards the doors.
three of my friends got it this way.
as long as you stay far enough away from the doors you're safe.