ignore that, ive figured how to get the shield ships: destory the antenna sticking out at the top and it loses its shield- the actual capture ship is AMAZING!
suddenly becomes a lot easier once u unlock "shortcut 8", due to the fact that they destroy all lesser planes alone, and as they continue, enemy units turn around and follow them, leading their units away from ur own base
ignore what everyone's been saying about cabe 5- u only need 3 units to beat it, which are mermaid, centaur and succubus, for their attacks push back the ghost goblin- your other units should be yetis and dragon riders, and also use invincible spell and comet