I think the line between good powers and broken powers is pretty thin. But here are a couple off the top of my head.
Moment of Glory (Cleric - Daily 1) - truly becomes an encounter of glory. It's just about a win button at low levels, and turns into merely a great power at higher levels, better than many level 5 and level 9 powers.
Certain Justice (Champion of Order - Encounter 11) - I think this is the ultimate elite/solo neutering power. Given it's an encounter power, and very accurate, it's IMO pretty broken.
I could list a number of single target multi-attack powers as broken (or at least bent), including twin strike, but in moderate amounts, these powers are actually fine. A twin striking ranger is fine, a fighter with rain of blows is fine, a barbarian with storm of blades is fine. A half-elf (or revenant) Barbarian|Fighter with all three, maybe needs to be moderated. Also in the presence of multi-attackers, buffing powers like Wrath of the Gods (Paladin Utility 6) or the War Chanter AP feature become rather potent.
Moment of Glory (Cleric - Daily 1) - truly becomes an encounter of glory. It's just about a win button at low levels, and turns into merely a great power at higher levels, better than many level 5 and level 9 powers.
Certain Justice (Champion of Order - Encounter 11) - I think this is the ultimate elite/solo neutering power. Given it's an encounter power, and very accurate, it's IMO pretty broken.
I could list a number of single target multi-attack powers as broken (or at least bent), including twin strike, but in moderate amounts, these powers are actually fine. A twin striking ranger is fine, a fighter with rain of blows is fine, a barbarian with storm of blades is fine. A half-elf (or revenant) Barbarian|Fighter with all three, maybe needs to be moderated. Also in the presence of multi-attackers, buffing powers like Wrath of the Gods (Paladin Utility 6) or the War Chanter AP feature become rather potent.