Originally Posted by Sausaletus Rex

Depends on how many enchantments you're running. Blessed Signet adds energy based on how many maintained enchantments you have up. There's a cap on energy, too.

But, okay, with Inspiration of 12 you've got MoI reducing Signet's recharge timers by 45%. That means Keystonesig is 16~17 seconds, depending on rounding and Blessed is 5~6, depending on rounding again (I'd guess that it's the higher value but I'm not sure). There's aftercast on signets, too, in my experience, so the 2 second casting time is actually 2.75. So, you can cast Blessed Signet once, then Keystone, then Blessed within 8.25 seconds. Then you'll need to wait just over 14 seconds before using Keystone again. You could then do it all over again, as Blessed would recharge at 6 seconds and then would need 2.75 seconds to cast, leaving Keystone with 5 seconds to recharge. Now, Keystone will recharge in those 5 seconds but by the time you finish casting it Blessed will already have recharged so you want to waint until you get that forth Blessed off before using Keystone for the fifth. You could then repeat that patten of Blessed -> Blessed -> Blessed -> Keystone -> Blessed ->Blessed -> Blessed -> Keystone -> Blessed -> Blessed -> Blessed indefinitely. So, let's just say Keystone will add 1/4 to the effects of Blessed Signet. It depends on when you get that energy and it's frontloaded a bit, the longer you go the less impact you get from Keystone, but that's the simplest way to parse it down.

It's not quite that simple as Keystone takes time. So while normally starting from the moment you cast Blessed it would take you - with MoI - 35 seconds before you could cast it four times. With Keystone, starting from a zero point of that first Keystone after that first Blessed (Which is the infinite point), it takes you something like 26 seconds.

So, now you get 3 energy per maintained enchantment per Blessed. With one enchantment up you get 12 energy with Blessed alone over those four casts or 12 energy in 35 seconds or about .34 energy a second or the equivalent of just over a pip. Keystone turns that into 12 energy in roughly 26 seconds or about .45 energy every second. So it's somewhere around 30% more efficient. Add one or more enchantments and you get that same ratio, although you get a lot more energy. Each maintainted enchantment with Blessed is about a pip. Each with Keystone+Blessed is about .45 energy a second. That's with MoI, of course (Without it it's less, .24 energy a second with just Blessed. With Keystone....well, you do the math on that...). And the proviso that you spend a *lot* of time casting even just Blessed to get that energy.

So if you can keep five or six enchantments running with MoI and Blessed Signet you're talking about an insane boost to your energy regeneration (Six is the most you'd want to run with DF of 12 because after that you start hitting the energy cap on Blessed Signet. But keep in mind that you're putting yourself into degeneration yourself to do that.).