Which heroes are competitive in the current game?

[Xirael]

hello to everyone! As I stated before: which heroes are competitive in the current game? the question surged at the moment I was thinking in which deck should I buy now that I reached lvl 5 with my new account (I have an old one which I started before the release of DP), but then I realized that I didn't even knew which heroes are still competitive in the current meta game. So, before wasting shadow crystals in a bad decision, I wanted you, the more experienced players, to answer some questions I have right now:
I was thinking into buy the deck I used in my old account: the human hunter deck. But are they worth the shadow crystals? I used to like (and I think I still do) Victor as hero, but is he competitive in the current game? or is he a hero which ability is just useless in the current meta?
And before I went into inactivity with my old account for a while, I was giving a look at the rouge deck, and I think I liked it, but again, are they worth the crystals??
Also, if any of those ( human hunters (specially Victor) or rouges) are actually not competitive, which ones are? and why the others simply are not?
Thanks in advance for any answer.

*Edit: And another question more: which ones of those heroes are more simple to use? as a semi-casual player, I don't want to end up buying something that need hyper-expensive cards for work barely well. And also, the deck I already have is a Eladwen deck, and I'm building it for be a rush deck (I know, it's super common, but I just wanted something cheap and semi competitive for start, and then go with a deck maybe more complicated but which thematic I love more =P).