It worked for me. Trophies are back up to 150 and everything. That appears to be a specific problem for you.
Actually, Horatio was sort of disappointing after seeing the Vicious version. A pure fireballer might have trouble keeping up the mana to finish that fight, but on the whole he was less resource intensive than Bleaty, since he barely hits for anything. Maybe up his damage to 125 or so? I dunno.