I didn't think it was that bad...
Just run (not walk) away from the boss, get the soul cube, repeat. Unless they changed the game seriously for Xbox, it should be the same on all platforms.

The one in Hell, I felt, was worse, but that's because you have to shoot a much smaller target. Great game, though, not nearly as bad as the consensus makes out.
(inquisitor is currently wasting time, Mon 4 Jul 2005, 2:39, archived)