2 Traders seems to be kind of a waste of social points, before all if you want to play together.

It's kind of the core issue, that the AI is kind of too smart in many cases and knows to much, therefore makes stuff like glass cannon a pain in the ass for casual gamers.

Keeping the glass cannon sneaked for the beginning of the fight and let him join later could force the enemy to onload on other team members, before the glass cannon joins in.