As the only hero I consider to be truly overpowered, Praetus can top a stage's damage without being placed. Not only does he have a high base attack and permanent damage increase that very quickly reaches 50%, he also builds summons to attack while he does over time and true damage during his ultimate. On top of that he is the Arbiter lord with a skill that is odd but extremely good, as he gains stacks just for being present, which you can spend to do big damage. With a full team of Arbiters the results are insane, especially since Arbiter damage increases by 50% for a while. If stacked properly with a full Arbiter team this guy is far too good.