[Agema]

Atlantis has an issue with small armies. They both have fairly weak scales and extremely expensive (both gold and resources) troops. It's so hard to build up your best troops that you really don't want to lose them, especially because Assartuts and to a lesser extent Ice Guard can readily end up with 3-4 XP stars, which makes them terrifyingly powerful.

However, if you're saving up all those design points, you could readily get better scales. I checked out E4N4S9, and even without the +4 prot, Assartuts are very hard to kill, of which the Twist Fate is a big part. The lower reinvigoration still leaves them capable of fighting for a long, long time.