Unfortunately - two of the champs you took to 60 are pretty much useless. Shaman and Tallia are very situational, and should be replaced asap.
From your list - Sepulcher Sentinel is the one i'd max. She's very, very good for CB. The rest of your champs aren't really great for CB, so I wouldn't spend too much more on them for that.
Honestly - after maxing SS, I'd probably just level food waiting for better champs. What you want to keep your eye out for are champs with good AOE wave clear (for dungeons), and anyone with a team counter-attack (for CB).
There's plenty on your list to eventually max - champs like Fenax and Fayne - but they just won't help you enough at this point IMO.
You shouldn't have taken Shaman to 60.
You have a lot of farming to do with many champs to 60- Achak, Sepulcher, Fayne, Fenax, Vergis, and Coldheart. I might also grab a Warmaiden since you are lacking defense down. Do not food anyone in Broadmaw or Rhazin Fusion (Broadmaw is always good to fuse for extra tournament points.)
Oh, and I could never forget Zelotah- this saves Trips a comment.
You've got ColdHeart in there so what ever you do DON'T use her for food
I totally agree.
In addition to that: Don't use any of the rares as food, that are part of the Rhazin fusion. Rhazin is a great legendary champ. I see Penitent, Spikehead and Rocktooth.
You can see fusion champions from the blue dot on bottom of their portrait.