Grok and only Grok! Although he may be weaker than Deleb or Alastor at the beginning, only he has been granted teleportation, and he can handle neutral creatures, especially archers, just as well. Grok's demons rely on high speed and high initiative, not only in battle... He already moves 15% further than usual at level 1! And with skillful logistics, he can move 40% further by level 20! It's easier for him to acquire a super ability. If you develop Grok properly, he will become a powerful force.