Don't know about the best but a scary one would be Ambre, general, Kolos, then something random like maybe an emeth, basically most involve some combination of big 5 or if not combo one in hand. another scary one, guru, graks, Kiki cr and shakra, there are a bunch what one is the best idk but those are some scary ones.
Kiki cr,shakra,graks, guru cr.
4 of the most deadly cards in the game with a wide strategy and a laundry list of ways your opponent can lose?Yes please.
Alternarely for fun,id like to draw Hugo,rowdy,tessa,skiner just cause of the walls,and because it could be entertaining to try out
Herman is good because he has 8 damage and he cuts trough all the non-SoA cards - even more with help of Eyrik. Other cards are great against SoA. Eyrik quarantees fight against SoB cards and high damages take care of missed +life and DR bonus cards.