YossarianLives
Deity
I don't think we need to send them our map speculation quite yet. That's even more than they asked for. It should be enough to list the other teams we met, and let the know that we are south-west of their location. It's hard to get specific since we don't know where their capital is, but our north-eastern most tile is 13 tiles south and 2 tiles west of their most south-western tile (before they plant their new city).
Speaking of their new city:
They sure are protecting it. With three warriors surrounding Thunderfall, no wonder they haven't explored too far yet. Also, noticed their injured warrior.
I still think it might be good to say something like "Even though this deal will benefit you more, we are happy to agree to it in order to prove our intentions and build a strong friendship with your team."
Speaking of their new city:
Spoiler :

They sure are protecting it. With three warriors surrounding Thunderfall, no wonder they haven't explored too far yet. Also, noticed their injured warrior.
I still think it might be good to say something like "Even though this deal will benefit you more, we are happy to agree to it in order to prove our intentions and build a strong friendship with your team."