You can net yutys with a net projectile, so simply net the yuty on a wyvern (grapple to the wyvern foot while a friend flies or get on a cliff) the lead it's Carnos away off a cliff or into 37 managarmrs and then put upwards of 4 behemoth gateways on the yuty (net will have run out by now but just re net) and place doors then tranq