1. Tankers will get a "provoke" like AOE effect on their melee attacks. The more a Tanker lands his blows, the more and more mobs he'll attract. The bonus here is that it's not exactly like Provoke (it's not ranged) - but it makes a lot of sense. Some huge monstrosity is bashing the heads of a villain group - they're going to get more and more concerned about taking him/her out....

2. As a Tanker lands more and more blows, he'll start doing more and more damage. The longer the fight, the more powerful the Tanker becomes. I can't say that the Tanker will do as much damage as a Scrapper - but it'll certainly be more than he does now. This ability really gets to the core of a comic book Tanker. He's extremely powerful - but at the start of a fight, he holds himself back some. As the battle progresses, he lets loose....I prefer this system to a power because this way it's inherent. It's simply the nature of the Archetype. And it also sets the Tanker apart from the Scrapper's criticals.