We want to be making more 60s than 50s, going forward. You do not need a 2nd Kael, for example. However, some champions such as Warmaiden can function just fine at 50 for a long time, until you move on to a better defense down champion.

I believe I would do Apothecary first, then Visix/Drath 2nd, though I think those two are close. You have several strong options.

I'd go with Bellower first. He'll let you speed farm much faster than Kael does.

See I would do Tayrel great debuffer and pretty good all around IMO.

Bellower needs pretty decent gear to be a speed farmer no?

Kael is more than adequate as a farmer, a 3rd attack champ for next 60 is not a good choice. Especially after a horrible 2nd choice in CH :)

Dragon 20 is goal. I think

Apo, kael, ch, warmaiden, vsix/tector/vogoth 

Actually scratch warmaiden, tayrel better

I was thinking if it were me, I'd go Apothecary (for all around use) or Bellower to farm better gear. The reason I say this is, as a F2P player, I'm not swimming in Leggo or Epic books right now (I'm about 90 days in so only a bit ahead of the OP) and the rare books are super easy to come by. Now, if OP is not F2P and they don't mind spending for books, then I'd say Visix, Apoth and Tayrel. 

my apothecary is fully booked, so i guess it would be best choice, and using him alot. but i wonder about vogoth aswell, he helps me a lot in cb and dungeons, with raglin 2 turn revive full turn meter and she has cleanse, so he helps to keep everyone alive, if he dies, quick revive. i was lucky to get with one book cooldown to 2 turns. but would someone would be better instead of her, even apothecary? my current cb i use kael, raglin, vogoth, tyrel and coldheart. normal 1key, hard about 3.5-4mil dmg. got 12 epic books, wonder who should i give it to? i would love to get better farmer aswell, but i think way to early for me. and for farming i saw visix can do 10s runs aswell, and she helps a lot in fw, so for future farming i'm thinking would she not be better, but if i need to book her, then not really worth it. 

Apo is a good choice as next lvl 60. You can use him everywhere early on.

As soon as you have enough other lvl 60 champs, you should replace Coldheart from your CB-team. Attacks based on enemy max hp are limited in damage vs. CB, and turnmeter reduce doesn't work in this fight.

+1 to Apothecary. A great champ, usuable everywhere and in every team for a long, long time.

Apo it is then, thanks for the help everyone