I've added the following to the
Demonology FAQ.
What changes with 3.3.3?
Immolate:
More DPS for us, and there is now absolutely no question as to whether Immolate should be maintained during the execute phase, since at all levels of crit it will have a higher DPCT than Soul Fire. Do not Glyph for this, our glyph choices remain the same.
Life Tap:
Whether or not this is a buff or a nerf will depend on your current gear. rDPS geared 'locks with very high levels of spirit may find that they are getting less mana returns than prior to the patch.
Demonic Pact:
This is the interesting one. The increased uptime minus the cooldown means that there is now a 25 second window in which our pet can refresh the buff, rather than 12. In theory this means that our pet only needs half as much crit to maintain the same uptime as prior to the patch.
This means that Demo locks can now afford to consider dropping the 2/3 Improved Demonic Tactics which has, until now, been considered more or less mandatory.
The possibilities for alternatives are:
Suppression - 2% hit. Very useful if your raid comp or gear mean that reaching the hit cap is a struggle.
Improved Corruption - +4% damage on corruption. Corruption is about 7% of our damage, so this is a DPS increase of ~0.3%.
Aftermath - +6% periodic damage on Immolate. The periodic component of Immolate is again around 7% of our damage, so we're looking at ~0.4% dps increase.
Cataclysm - 4% reduction in mana cost for destruction spells.
Destructive Reach - 20% threat reduction and 20% range increase for detruction spells. The threat reduction may be very useful, dependent on the tanks you tend to run with. The need to keep corruption up (especially if you are running with substantial haste and GoQD) reduces the value of the range boost, especially as all our destruction spells have cast times. However, that's not to say you'll never enjoy any benefit from it, but don't let it be your motivation for taking this talent.
Improved Demonic Tactics - ignoring the benefits to Demonic Pact uptime. It's difficult to give a figure for this, but assuming you have about 50% crit raid buffed, and your felguard does around 14% of your damage, this is a dps gain of around 1.2%.
Intensity - 70% pushback reduction for destruction spells. This is situationally dependent, but potentially very useful. On fights where there is frequent pushback Demo obviously suffers a lot, due to long casttimes and lack of instants.
The numbers quoted above are very rough values, but it should be clear that if you are not having issues with hit rating, mana consumption or threat management, then you should stick with Improved Demonic Tactics as it provides a more substantial DPS boost than any of the alternative dps enhancing talents.
The cookie cutter 00/56/15 will, therefore, still be the standard spec, it maximises dps and DP uptime (if only slightly). Variance from this is only justifiable in terms of adjusting to raid comp - reaching hit cap, reducing threat or mitigating mana consumption issues (e.g. if your healers are struggling).