We can all say what we want, but the fact remains that there is mess of too many things happening at once. Gathering aleph from enemies, possible antagonist, hunting passive mobs, running from/ killing aggressive mobs, overload the boss, and shooting weak-points that consistently relocate. Also mentioned earlier, many skill are rather useless and at higher MMR, just make everything worse off. Plus about half of the raiders weapons are ineffective at destroying Uras behreits weak-points in the allotted time.
In theory it should all be simple, but too many things just complicate the matter.