I just decided to try a coordinated attack with a go order.

The result was:

Before GO was given:

1(and only) Manta just exploded or dropped out of the sky while trying to hold at 600m

After GO order:

3 Albatros' were circling their waypoint because they couldn't get close enough to activate the waypoint after waiting for a replacement Manta.

4th manta attacked solo because GO was given before it got to the hold WP.