(My experience)
On our first lonewolf playthrough on Tactician, it wasn't after until we killed the Kraken, Slenderman, Kemm, Lucian (with help of the Anathema), Dallis and Justinia's Black Ring spy or whatever, that we realized that Braccus was the main target... It was a really hard fight, the first time since being in Arx that we had to use a resurrection scroll (excluding the judgement altar, lol) and it was the wrong way to do it.

Had we agreed with Lucian right off the bat, saved Anathema for Braccus, and just SMOrc'ed him as fast as possible, it would of been boring. So yeah, the final fight is kind of snoozy. Really enjoyed cutting Braccus off with that persuasion check. smile