I've heard a lot about shade teams, but I'm only a lvl 40 with limited heros. I'll give you a list of the 3star/5star heros.
3* Nitpick, Shade, Viperia, Solaris, Augustus , Ferno, Ignus the mad, Tsume, Malice, Dagrund, shadowblade, squinch, indigo, takumi.
4* Nubnub. echo, gortusk, mangle jaw, nimrel, pontifex, exec
I also have Aria and Ember Saguine as honorary mentions.
I'm a pretty casual player and I don't know what would be best on a team.
Please post suggestions down below.