Roschard the Tower
Roschard the Tower is a the original block Damage Champion with the unique ability to apply the buff for 2 turns. Below are the comps currently found that include Roshcard.
The North Pole
Santa or Tower + Warcaster Unkillable with slot for cleanser for affinity friendliness.
Slow Tuned Man Tower Unkillable
Use a Maneater and Tower/Warcaster/Santa with a speed booster to achieve Unkillable.
Tower and Valkyrie Unkillable with 43 Champ
Use Tower to block the AOEs and Valkyrie shield to tank the stun.
Slow Tower Skullcrusher Unkillable
Tower + Skullcrusher Unkillable that allows a cleanser or debuff blocker keep your team stun friendly against affinity CB
The North Pole with 4:3 Champ
Taking the traditional Tower and Warcaster composition and adding in a 4:3 champion to maximize damage potential.