It's supposedly possible for Canthan chars to get into the Foreign Quarter if they assist a Tyrian char on the quest before the Viz Sq mission. I'm still looking for someone to run my Assassin there.
A canthan character can get to the foreign quarter quite easily. Once you've gotten to Senji's Corner, you can walk right to the foreign quarter and enter it, no gate. I don't know if you can do it any earlier as this is when I did it, with henchmen so party structure doesn't matter.
cool...now it's simply the matter of figuring out a build to solo Kenshi (we know that we can already solo Chkkr and Zuekao).
The recent update made Xeukao, just a little bit more challenging, he gets help now when you attack him
