This depends on how much AP you have, basically. Consider the formulas:
ES: 10023+4.566*SP
LH (1T): 8*(2792+0.247*SP) = 22336+1.976*SP
LH (2T): 8*(2792+0.247*SP)*2 = 44672+3.952*SP

Set ES=LH(2T) and solve for SP to get:

SP=56432,

which means that the breakpoint is 112864 AP. Above that value, ES will do more damage, below LH will do more (assuming both targets take the full duration, of course).

I think you have the old formulas there.

Should be ES: 12989 + 5.936*SP
LH(1T): 8*(3630+0.321*SP)= 29024 + 2.568*SP
LH(2T): 58088+ 5.136*SP

SP= 56376 AP=112752

That's interesting. I wonder why the sim has ES coming out above LH, considering that it only has about half those AP/SP values. They are getting the same buffs, used at the same time interval, but ES is doing more damage. Maybe a multitarget implementation problem?

It's the same as ES. 1GCD per minute.

Regarding WoG/Harsh Words glyphs, there's currently a bug in simcraft that causes word_of_glory_damage to consume no holy power.

With this bug temp-fixed, I was unable to get a dps increase, even if WoG was only used under HA (though the gap is very close in that case, below 1%). This is with both T13H and T14H profiles (modified to use HA instead of improved AW).

Regarding LH vs ES, it appears LH doesn't benefit from inquisition according to simcraft (another bug.. it does on beta, right?). ES is getting a damage multiplier of 1.56/1.3 with/without AW, while LH gets 1.2/1 respectively.

I'll fix the LH inquisition bug. I know about the word_of_glory_damage bug - it's a pain in the neck to fix properly because of the way Blizzard put the spell together.

The WoG/Harsh Word interaction at all is a bug though. They aren't supposed to work together.

The WoG glyph doesn't say it only procs from healing, so this seems to be working as intended. I don't doubt that it will be changed if we figure out a way to benefit from it, though.

I just wanted to add very quickly that Seal of Righteousness procs on every Divine Storm hit, as it used to in Cataclysm mechanics. I cannot seem to recall this being mentioned and I am curious if this affects the number of mobs needed to switch to SoR. It is the only seal that interacts with DS, just as SoT is the only one interacting with Judgment.

That could drop the necessary targets to 5 or even 4. However, remember losing the GCD to swap to SoR (and back afterwards) means you need the targets for around 30 seconds to break even.

FYI - I'm requesting this thread be closed and locked. The new MoP-live thread has been opened here.