allies

I've played multiple games that look alike Tribal Wars in the past. Many of them with a Market trading system. Some even had advantages when it came to trading speeds. For example, it would be significantly faster to trade among members of a same group e.g. tribe, allies. On that matter, me...

It would be very usefull if the ability to invite someone to login as your account was extended to include specified tribes (such as those of your allies). Removal from that list would invalidate all such invitations.