Sadly, no, not really. I wouldn't waste time with either.

Gerhardt does hit hard and bergoth has some utility, but we'll be able to tell you wether or not they can benefit you if you shar ea screenshot of your roster. 

Gerhard  is  a  single  target  nuker,  while  Bergoth  is  an  okay  CC  and  Support  champion  with  good  multipliers.  Bergoth  is  pretty  useful  for  Knight  Revs  Crypt  though.

I appreciate your answers. But should I upgrade them yes or no. That's what I'm asking

No, you keep asking for advice.  Everyone has told you to 6star a campaign farmer.  Until you do the answer to every question you ask is: "No"

Do not upgrade anyone else

Stop opening shards at the worst possible times

Basically do the opposite of whatever you have done to this point 

Yes yes, I mean after I do my Elhain, Bellower, and Melga

after you finish those three, assuming you haven't pulled anything better in the meantime, you should raise hk and thenasil. after them, you'd be better off with dark athel or towering titan (tho by that time i'd expect you to have ghrush and possibly scyll as well, both better options). even if you found yourself in desperate need of single target offense, you'd likely be better off with hexia than gerhard and bergoth isn't worth the resources unless you're absolutely desperate for support champions, which is the area of the game you're currently strongest in, or if you start raising champions just for the sake of clearing faction crypts.

in short, absolutely not.

I literally answered you in the very first post. No. You should not.

But just in case you misinterpret my statement - I am not suggesting you should use them as food, either. Stick them in your vault. You never know when you might have a specific need for them, and you also never know when Plarium may choose to upgrade existing champs again.