Distant Counter

I'd give it to Sheena to be honest. She's an excellent mixed tank.

I would probably look at it more this way. Instead of which unit needs DC more, go with which unit does your team need more? Effie or Sheena?

Well, DC enables both of them the same. And they're both as good, specially if you give Effie's Berkut's Lance.

Up to you. Effie and Sheena are the core of my arena core, if that makes any sense. You can't really go wrong with either.