Yeah this is what I expected. You are *way* too early to be considering CB at all.
ATM your focus should be:
1) Get Kael to 60, full masteries, full books
2) Get Alek to 60, full masteries. don't book him though.
3) Don't raise anyone else past level 40. Don't ascend anyone else, don't get masteries for anyone else, don't book anyone else. None of the rest of the champs you currently own are worth investing in, at the moment. Warcaster *could* become interesting, but he needs other pieces, and until then, he's just dead weight.
Just keep building up food. You're going to need a *lot* of it. Use the market to buy 5* epic+ items to gear up your main two champs, and play the waiting game. It's boring, yes, but when you do get the champs you need, you'll be able to power them up to 60 very quickly this way.
Assuming you don't get anything else, the next champ you should level is High Khatun. Get her to 60, she'll help you everywhere, even endgame she is valuable for faction wars. After that, there are a handful of other daily login champs that are worth investing in. Scyl is far and away the best of them. If you don't get anyone better by then, Dark Elhain is also pretty decent.
In the absolute worst-case scenario, that should be a team more than capable of handling dungeons up to 20 - High Khatun lead, Scyl, Kael, Alek, Dark Elhain. It's a bit damage-heavy, so you'll probably need to gear them a bit tankier than otherwise, but it's a guaranteed progression path.