As the only hero I consider truly overpowered, Praetus can top a stages 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. He gains stacks just for being present, you can spend these to do big damage. With a full team of arbiters the results are insane and it also increases arbiter damage by 50% for a while. If stacked properly with a full arbiter team this guy is far too good.