I'm not really seeing it with Juliana's kit in Hydra, but maybe i'm missing something. 

i

I assume buff removal from a head, plus can place HP burn, which is strong in Hydra. She can also place a couple poisons.

Absolutely nothing in her kit that I can see which would be beneficial in Hydra. My guess is that the ratings are just misleading, since people don't really use the rating system much.

Good point. I did look at that but perhaps I underrated that. I suppose a lot of her value in Hydra will end up being relative to what the rest of your roster is. 

That's the thing. I am shooting for 20mil on Normal so I can 10mil on Hard. Other people are shooting to get the bottom chest on Normal with 3 keys. Perspective, and the underlying account strength, really changes those ratings.

 It sounds like she might be decent on a B or C team with champions that are mostly used in other areas of the game that also remove/block buffs. I've got a grand total of 4 epic books right now so it doesn't look like she'll get built any time soon. Dhukk will do more for my account overall and people seem to like him in Hydra, too.

That and we need to find 18 champions which isn't always easy. 

That's the thing. My C team is TERRIBLE. Could use more buff removers and block buff champs.

Dhukk is excellent, and one of my fave champs, by the way. I used him everywhere on my little account I gave away, CB, DT, Arena.

My short-term plan is to build a "C-team" that can 1 key normal, and hopefully 2-key hard with my better champs.  I don't think our clan will be unlocking next level soon based on our current level of interest :)