I took my archer in to try and take on Travesty this morning. It was a long drawn out fight, but I'd just gotten her down to where it was almost time for the summons to appear, and I ran out of time. I know how to cut down on my time now, after having tried several different bows out, but I found out something interesting about using an archer. Travesty will not mimic you as long as you stay 8-10 tiles away from it. So if you use a bow (I used a magical short) with that range available, you can easily take her on and never get hit. The only time I was attacked during that entire 2 hour fight is when I got overanxious and got too close. I just backed off so she was a screen away, waited for her health bar to switch from my char's name back to Travesty, then went back in and started shooting again. My arm is tired after that long battle, so I'll wait until tomorrow to try again, but I know for sure that I can solo her with my archer.