Fighter:
Anvil of Doom is an A+ for hammer wielders. No question. That power is a keeper all the way to Lv. 30.
I'm also for taking Chains of Sorrow down to an A- or even a B+. It's a good power, to be sure, but you have to use a flail to make the most of it, and flails suck (no good feats).
So, would you say that Anvil of Doom is possibly too powerful for its level or would be dangerous for another class to get?
Flails don't suck... Whether they get more or less feats in other supplements, who knows but their base statistics are in line and not everyone has feats to burn. Either way, if you're already a flail user for whatever reason, what mark should the power have?
Renewing Smite is a D at best, maybe even an F. Seriously, you're actually FAR better off taking the other of Invigorating Smite or Righteous Smite (the CHA-Paladin Lv. 3 powers, and as a side note, both those powers need bumping up to the A/A+ range). They do the same amount of damage and the healing is widespread (and in each case only 5 points less to all allies in the area than Renewing Smite's amount on only a single ally).
It's amusing how everyone has different feelings about healing... Renewing has one thing over Invigorating, it doesn't require bloodied... but yeah, it's even funnier to compare those against each other then against Inspiring and Bolstering and wonder what's going on here.
Stunning Strike is a flat out A, maybe even an A+. A stunning power could do 1 measly point of damage and it'd still get an A because stunning is really that good.
If Anvil is A+, then it should clearly be an A, or perhaps an A+ as well. If Anvil is an A, then most likely it should be an A-. It's possible they should both be As, even though Anvil is more of a 2d10ish power than a 1d6ish... would be a little odd, but very possible. Stunning does, indeed, rock. Though it's a lot more balanced than in 3e since you have a lot more rounds and lot more enemies and it doesn't make you drop things.
At any rate, so roughly that's just asking - is stunning so powerful that when it's introduced at level 13 it's better than all other options and regardless of the damage of both they should both be A+?
Fury of the Sirocco should be a B, at least. Rearranging enemies in a close burst to your tactical liking is a very powerful ability.
Not exactly to your tactical liking, since it's only slide 1. But certainly helpful. So, it seems worse than the other close bursts to compare against - for instance, it seems on par with the level 3 fighter Sweeping Blow, worse than the level 7 Ranger Sweeping Whirlwind, worse than the level 13 Paladin Whirlwind Smite.