Crooked Bee
(no longer) a wide-wandering bee
the only time I died when playing HK on Hard was in the Feng Shui break run where you had to destroy that buddha temple.
Suddenly there were 5 mages outta nowhere who spammed fireballs that dealt 15 DMG each because of the rising Qi or some such shit. I forgot to put one of my characters in cover and the mages all focused on that one, effectively killing her in one turn. I didn't have much medical supplies because I never needed them, so I sent Gobbet to revive Is0bel, only for the mages to knock Gobbet out as Is0bel got away. My PC and Gaichu didn't have much to heal themselves with, and them both being close-ranged melee characters didn't help with staying behind cover from the incoming fireballs.
Is0bel could only shoot missing grenades. Then everyone died by immolation.
That is why you take Racter with you. Almost everyone targets Koschei for some reason.
Although for that run, I actually took Gobbet instead of Racter for a change. (Which came in handy because she could dismiss a hostile spirit right away.) My dodge-y character was the front line so everyone focused on him and missed, after which the mages were promptly dealt with by stunning and grenade launching and then just plain shooting them.