5-Star Hero Struggles

Well, now that I've been ranked in the Tournament for a while I guess it's time to start getting 5-star hero shards... The only problem is that I can't decide which 5-star hero I wanna farm for. Warlock, Judgement, Captivator, and Overlord all sound pretty nice. I like Humans and Mortiis the most, so that's why I'm leaning towards Warlock or Overlord; however, Judgement's skill will work really well with my human deck, and I want Captivator because I play favorites a lot (she's cute, okay? Give me a break >.>). I think, I'm probably going to end up getting Judgement, but I don't know. I know the second one I go for will definitely be Captivator, because I want the profile picture so bad lol.