The major problem with trying to confront and overcome the assorted badness of the Warhammer 40K setting is the corrupting, madness-inducing effects of the Warp, and of its creatures such as daemons. There are quite a few crossover candidates who would have the power and inclination to do quite a bit of good if brought into that setting, except that the effects of the Warp and its associated Chaos would be very likely to drag them down and make them part of the problem.
Those who can walk the Pattern of Amber, at will and without difficulty, would very likely be immune to those effects.
(So would Andor-Drakon and his underlings, but only by virtue of being even more intimately Chaos than the Warhammer setting knows about. He would be at least as likely to make things worse as better.)
Those who can walk the Pattern of Amber, at will and without difficulty, would very likely be immune to those effects.
(So would Andor-Drakon and his underlings, but only by virtue of being even more intimately Chaos than the Warhammer setting knows about. He would be at least as likely to make things worse as better.)