@DSSven There is a difference between having an advantage and defense being crippled. Unfortunately I have to disagree, defenders are the ones that should have the advantage especially because:
1) Defenders have to be planned to face a myriad of combinations out of 60 or so heroes. This is why those actively playing will always have the advantage.
2)Defenders have to pray RNG is on their sides.
3)Higher level defenders already face a built in handicap to help lower level attackers besides the energy gain they receive from attacking the minions.
Ideas to help defensive side:
1) If a defensive line consists of three or more legendary heroes, give the minions in that line legendary stats.
2)If the defender has the legendary for the hero in the minion section, allow that hero to have the legendary skills of the one that is owned. Like what happens in Titan Temple s when the owner owns the legendary hero.
3)Adjust energy gain for the defenders to a ratio along the lines of 1:1.5. This at least would allow defenders more of a fighting chance.