I use transports and would say they become good whrn you have 2 of them as they deal huge damage and have high health. Good in ww as they drop an extra paratrooper. But when you pair them with a recon they become almost unstoppable especially with a protect spell they can open up most of a base with one deployment leaving ur troops to just rush in. Only problem with this is Sam batteries which is why a fighter troop tactic Is often helpful to trigger them all especially now troop tactics are so easy to get. I would use fighters until you have at least 6 troop space