I used this team which had a TP of 3028:
Boldtusk 3/60
Grimm 4/70
Gretel 4/70
Colen 3/60
Valen 3/50 (7/8)
No problems on the first 2 levels
Did the final level at first attempt - used a couple of health pots and lots of tile ghosting to get to the boss level unscathed and fully charged. Then used bombs and a couple of dragons to weaken the bosses, and my heroes did the rest.
I usually like to play with two healers, so this was a challenge.
Now I need to decide whether Gretel or Grimm get the emblems. I have no-one ready for the other lot.