Press the Attack is one of the largest issues for higher damage. A somewhat opinionated post
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12% more damage from ALL SOURCES. This is obviously a problem. Tanks can get bursted, tanks can burst themselves, every other damage champion can kill you that much faster. It would be great if a) there was another way to increase damage, and b) the +% damage was only amplified from the champion who proced it.
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Granting physical damage upon the hit doesn't really make sense when you already score 12% more damage. This was a great opportunity to add something defensive, something for scoring that third proc like bonus MS (this is phase rush though so don't), a shield, healing, mana restoration, something that isn't raw damage.
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It's not only ADC's who pick it. Most bruisers and fighters will also take this for lack of a better rune. In fact, the viable champions for Press the Attack are probably a solid 1/3 of the roster. That's over 40 champs for one keystone out of 15.
There could be a lot done to this rune but I think the combination of the bonus damage and the 12% vulnerability from ALL sources is very overloaded.