It seems to me to be completely random. Sometimes it's just the leader other times it's him plus 2, plus 3, or even plus 4. I tried it 5 times in a row and got me vs leader first time (almost won but control my dragon was messed up. Wouldn't let me attack and had to keep refreshing and missed a few turns. He had 1k left). The next 3 times he had 2, 3, or 4 helpers with him. The chieftain has about 28k health and the helpers 21k....I just died out without trying. The fifth time it was me vs leader only again and I won. It was still a hard fight. I was full buffed and using 1 great endur, 2 great elixir of life, and 10 great glyphs of life. I treated him like an elite and hoped he locked on my dragon. Which he did...kinda.

He fights like a normal person: Can use magic (all I saw was air. I don't know about others.), can use nos orbs (flawless), his physical hits sometimes leave flawless deject (like dekadors) and he hits for about 400 per hit.

I got Captain's Chest for it. :)

dragoneternity.com/game/fight.php?id=535c8d69-b65a-0202-06a8-63d499df6fb7