Hood should stay at rank 3, unless you really like playing with him and he's duped.
I originally decided to get him to rank 3 when I was low on good defenders for alliance war, and ghost rider could help me with killing the collector with the trinity so maybe it would be good to rank up ghost rider instead.
Comments
If you like to use Ghost and/or Wasp, then choose Hood (great synergies). If you run Blade, then choose GR.