Hello everyone,
I could need a big help from this great community. I am struggling to get the best out of my heroes to make the best possible defense.
Help would be great like for example:
Thanks a lot in advance 
No one, can help ? Would be nice if people help
Do you have emblems you could put on either Onatel or C-Joon?
Sadly no Emblems for them
In that case, I would go (left to right) Cobalt, Frigg, BK, Norns, and Jabberwock. For regular defense formation that is. I am not knowledgeable enough on the other formations.
Put me down for Cobalt, Frigg, Black Knight, Mushasi, Jabberwock
In which formation? Backward ?
Based on a full rainbow emblemed team I’d go in a double formation left to right: Cobalt, BK, Frigg, Dr. Moreau, then Musashi (Replace with C. Joon when possible. It would be a taunt, accuracy down, def down, and beat down scenario.
Jag gave good advice but I always have trouble with backwards formations.
Same. Reverse formations for me are the toughest. Double or reverse double is susceptible to hit 3 heroes…Hel and Proteus freeze the entire team for free board manipulation. Reverse frequently charges up several big hitters at the same time. Frigg + any other AOE is trouble.
For the OP: I’d go reverse formation with Frigg, BK, Musashi, Jabber, Cobalt.