Problem with daily item uses like that is that it's not a FUN use of an item daily. It's like, yeah I can see how it COULD be useful, but in each battle where I had a save that I missed, did I miss by 2 or less? And even if I did, how do I know the next battle I won't need to save sooner, than this one? If it's do or die, sure use it, but most of the time you're struggling to find the optimal time to use it. Dwarven just works. Every day. Always useful. Still a daily power, but it increases your power in a clear, mechanically simple way that doesn't require much thought about when to use it. Are you about to die and already used up your second wind / all your surges? If so, now's the time. That's a good magic item. One that doesn't make me feel like I'm betting against myself, or the odds that I'll be worse off later than now. Ugh, that kind of thinking gets annoying after a while. Like I said, I had Delver's for like two levels and didn't use it once. Granted, that's a heroic...but the higher versions of Delver's don't scale. IMO = Crap.