WotLK Glyph of Corruption vs Glyph of Life Tap

[Acidmath]

As an Affliction Warlock who has no spirit gear, what glyph would you recommend me?
I understand that Glyph of Life Tap is good when you have a lot of spirit offset, but with ICC gear, does Glyph of Corruption becomes better?

Playing on Icecrown.

[rc100]

Glyph comparison all the info is from elitistjerks.
The numbers are with BIS gear which don't have any spirit on it, according this information is still around 10 times better.


Glyph of Quick Decay 471.24 / 648.38 dps
Adding haste rating to Corruption - the best glyph by far at the moment.

Glyph of Life Tap 248.97 / 324.74 dps
As you would lifetap 1.5 times a minute anyway, this glyph gives a huge spellpower increase at no costs. Even when you don't need the mana the GCD is worth it (think of general vezax here. Downgrading the spell to rank 1 is a smart action for situations like that). As a side effect, the impact of this glyph makes spirit an even better damage stat.

Glyph of Haunt 88.36 / 89.87 dps
Increasing the Haunt effect by 3% is an 2.5% increase to all your dots and results in about 1.2%-1.5% overall damage increase, which is quite good for a single glyph.

All other glyphs are inferior to these:

Glyph of Curse of Agony 30.51 -> 37.04 -> 62.86 dps
There are two more heavy ticks when you use this glyph. The damage amount coming from spell power does NOT change per tick (but of course the DPCT changes). The damage plus from the additional ticks is constant and can be computed like this: base dps unglyphed = 1740/24s = 72.5 dps. base dps glyphed = (1740 + 2x389)/(24+4)s = 89.93 dps. So the glyph gives a constant 17.43 dps increase here. Furthermore, you gain (60/24 - 60/28)s = 0.358s per minute because you have to recast CoA less often. In this time, you can cast your filler spell, giving you another 784.6 / 1176.3 dpm or 13.08 / 19.61 dps.

Glyph of Corruption 12.49 dps -> 19.47 -> 36.01 dps
This glyph increases the proc chance of Nightfall by 4% (or by 3.96% if it really is multiplicative and you have talent points in Nightfall - it does not make a measurable difference and none will ever know). The effect is not very good dps-wise. As a side note, this means that the talent Nightfall is not very good dps-wise, either.

Glyph of Shadow Bolt 10.94 dps -> 14.14 -> 20.24 dps
This one is quite weak - mana costs are just not really important to a warlock.

Glyph of Unstable Affliction 0 dps -> 0 dps
Decrease Base Casting time of UA by 0.2s (before haste. This works like the talent bane for sb/immo.) Unfortunately, it does not lower the GCD for Unstable Affliction. Your cast will be followed by a 0.2s GCD and so, the Glyph will not give any DPS increase.

[Acidmath]

Really nice. Thanks for reply!