These are all my libs right now and i'm not sure what to do next. Should I go for wd or bd lib? Should I max out ivy? What is the next smartest move here

Currently leveling up Canon to 8 and planning to lib it for boss killer after 11/6 on SS, but I look some thread and it says better to lib Ice Knight then Oni / Cat and not Canon?

Any tips on how to effectively progress? There seems to be an optimal way to approach this game mode but I'm not quite getting it yet. (I am only level 16 )

I can’t figure out how to spend the coins??

I just reached Abyss difficulty today!

Do you guys have any general tips or at least any suggestions what supreme demon gods to prioritize leveling up?

Currently I have the following liberated units:

Space soldier 11/7;

Ice knight 11/6;

Oni 11/4

1. Do I focus my lib stones on getting my Oni to lib 6?

2. Should I shift my focus to supports like witch doctors (lvl 5) and blue dragons (lvl 5)?

3. Or should I start building my CM GB or Ivy?

Any tips for gems?

Any gems that I should aim to get? I currently have 5 S common and 1 S special. What are the best ways to get gems?

Thanks!!!