Or is it just me?
I've only ever managed to beat them once and that was solely down to luck, winning initiative on a crucial turn which allowed McMourning to kill them before they killed him. The rest of the time I struggle to even give them a close game never mind win.
Any advice would be welcome, although I don't have Kirai (or any of her spirits for that matter) or any non-Resser models (so no suggesting I use Von Schill or Jack Daw).