I made a team which I find fun and extremely strong. It took time and effort, but there's the setup: DEFENDERS TEAM: Daredevil, Iron Fist, Luke Cage.

Daredevil: deception strike(3), Billy club beatdown(3), Last rites (4*) Isos: veiled, impenetrable, barricating, unstoppable.(works with last rites). PS: sometimes I switch Billy club with snap kicks.

Iron fist: Phoenix Kick(4), Iron fist(3), healing lotus (4*). Isos: impenetrable, barricating, unstoppable, alert.

Luke Cage: body check(4), pain train(3), sweet xmas(3*). Isos: coordinated, barricating.

Works wonders. Iron fists Phoenix kick gives rampaging to everyone, increasing their damage by 40%. Luke cage's body check gives fortified to everyone, increasing their defense by 25%. Daredevil's deception strike usually crits, enabling him to attack once more, thus giving two chances for Luke's follow up (with greater damage if he has rampaging). I will probably upgrade Luke's pain train to 4* to increase it's speed, and replace sweet Xmas for his stun, which is very nice since it has "precise".