actually start at hokkaido build troop research get some archers and knight kill guy below, build another troops research until full research then work on stratagies (worked really well) after about 2/3 of the map is yours build green giant summon things, and then you have heaps for the aliens (makes sure you have a green giant or 2 when attacking aleins and also an army to climb into the square or reinforce it in case your army is defeated you need about 12 giants for boss BUT use ninjas and samurai in 2 separate attacks to kill other aliens!!!! then send in green giants with ninjas AND NINJAS ONLY!! to attack boss and use only the 60% revive power(you will probably run out of time although you SHOULD kill the boss but don't worry just finish them off next turn with ninjas and samurai buy or move them into spotsduring the turn of the attack) the boss will not respawn, oh and save your game before executing this turn in case you should be defeated and lose your giants
FOUND A GLITCH
AFTER U KILL THE GIANT WHEN U GO DOWN THE HOLE AND U HAVE JUMP UP THE PLATFORMS THE ONE THT WHEN U STAND ON IT IT DISAPPEARS NEVA REAPEARS