Need some advice

[aVenezuelan]

Okay guys, this is what I currently own:







I'm here because:

1) I have no idea of which unit I should focus on leveling and CCing first.

2) I'm having problems with gold used to level up, i've been farming Deep Forest Road and recently moved to Tower Overwatch, however, my 1.5x gold thingy expired and now I don't know if I should just sell the units I get and not use them as fooder. What should I do?

3) As you can see i'm almost maxed on space (66/69), I have a lot of spirits of gold and silver (and also a lot of silvers and repeated), and don't know if use them for level ups because then if i'm max on space then I won't be able to farm.

4) What team comp do you recommend with what I have? I've been using almost everything tbh, just adding what I need depending on the mission. Some need more mages, some need more witches, etc.

Thanks.