I don't think this game is for strategists.. You buy a million T5 warriors port next to someone kill, kill, kill, until they lost everything then port to next and repeat. No-one will retaliate because they have all left the game after just starting as you can't do anything in this game if you don't spend more than the other ones.
If they had a cool-down on teleports or gave a temporary shield after so many hits or stopped lvl 25's spam hitting lvl 6's or allowed the watchtower to watch for incoming attacks and give you notice and not just let you know 1 second before an attack then this game might keep more people playing. And not have dead worlds after such a short period of time after the worlds were added. This game is all about who can spend the most.