@bubrubber Your fights go quicker the higher your arm strength, the more above the requirement you are, the less time it takes to conquer a country. So for now it'll take to long for you, but it will get quicker and quicker.
I went on CoT 5 for a laugh before I'd done 3 and 4... and won, i used, Goblins, bombers, dwarven engineers, taurus, zombies and phantom armours, because they all spawn quite quickly, it kept the annoying invisible goblin at bay, while virtually an entire army massacred their castle. I was also using Comets to keep their enemy numbers down, along with freeze spell, and thunder... and the invincibility spell once i let loose the enemy goblin ninja... lol