[HoneyBadger]

It's not always easy to use size 1 units well, but it can be done. Each size level has it's own advantages, and disadvantages. Yes, tramplers are a big issue, no pun intended, but Nations which primarily focus on size 1 units should have a solution to most trampler problems.

In the mod Nation I'm doing, for instance, size 1 dwarfs are grouped together with giants and trolls, which range from size 1-6. They've also got access to quite a bit of elemental power, especially air, so thunder/lightning isn't much of a danger. Also, I haven't decided yet, but it's likely the dwarfs themselves will get some kind of minor (25% in most cases) elemental resistances.

Kharam-Dzu, on the other hand, had a very impressive repeater crossbow that, when massed in sufficient numbers, would make short work of elephants. It wasn't the perfect solution, but they have plenty going for them.