While there is a lot of passion out there about modifying other aspects of energy regen the one that I'm going to approve and push through for now is as follows:
Rogue energy regen will be changed from 23 per second to 24 per second.
Tablets will have energy regeneration removed from them.
This gives you the effective energy regen of a character using a tablet - for free and all the time.
We will not be addressing concerns regarding fervor or other energy regen buffs at this moment in time.
Lead Game Designer: Rift
I remember doing the math at one point for bloodstalker and NB which are the most starved builds and ended up with around 27 energy regeneration needed with fervor and tablet to not be starved with them. I think I used 50ms latency and regular rotations for the math but I don't have it saved anywhere anymore unless it's in my post history. 27 regen with fervor vs 23 regen and no fervor is a massive difference and means we are a lot of the time just standing around waiting. It's so bad that for example NB can't even be used at all without fervor. It's also not some extra performance compared to other callings we get from fervor, it's a requirement for us to not be way behind everyone else.
I think 27 comes up a lot because it pops up from several calculations of what our rate needs to be to not be energy starved with just LE. For example most of our 1 CP builders are 30 energy, with a 10% discount that is 27 energy. With one 40 energy 2 CP builder, three 30 energy 1 CP builder and a 20 energy finisher you again get 30 energy per second needed, again with the LE discount it's 27. It may in fact NOT be the right number, but it comes up a lot.
The larger problem is we don't want to need LE/fervor all the time just to be able to use most of our specs and not have to learn one rotation with nothing, one with LE, another with Fervor and yet another if we have fervor and a tablet. Unless we have a mage with LE for 5-mans we pretty much have to run MM or BD for DPS since ALL other specs fall so far behind due to energy starvation.
Dummy Foundry rocks. CQ blows. Energy is meh. MORE ROLE SLOTS! Burma shave.