Our Ghoul gets 40% of our str, which means he'd get 21 Str, which with kings gets it to 22 additional str. Assuming Ghoul AP works the same as our AP, that'd be 44 attack power for the ghoul.
So... 106 AP + 6 AP + 44 AP = 156 AP, vs 180 for the Endless Rage.
Are we counting Dark Transformation as doubling the ghoul's AP? In which case it'd be 200 AP vs 180 AP for the flask... Hrm.
1) I think we would get 60 str out of [Elixir of Mighty Strength] (50 +5% for kings +15% for Unholy Might), meaning +60 str +6 AP = 126 AP
2) I believe our ghoul, with [Glyph of the Ghoul] (just linking the old one for proper calc purposes), should actually get 110% of our strength... maybe more if they've changed the base str Unholy DK ghouls get. That would mean that +60 str for us means +66 str for the ghoul, which would be 132 AP for the ghoul.
3) Ghouls do about 30% of our overall dps. So, do you give your ghoul (who does < 1/3 of your dps) an extra 132 AP (which technically does scale well with SI and DT), or do you give yourself an extra 68 AP, which increases all your other abilities, including your other minion - Gargoyle?
4) Let's say we get DT to 50% uptime (low side?), then I think that would mean the ghoul's 132 AP would equal roughly 198 AP once you factor in 50% uptime DT. SI ups the value of that AP even more.
If the ghoul's personal raw dps is roughly half as effective as the DK's personal raw dps (the ghoul is doing ~1/3, we are doing ~2/3, meaning we're twice as powerful as the ghoul), then that 198 AP would be relatively equal to 99 AP in terms of our personal dps. Right? If that's correct, then the two elixirs are worth at least 225 AP.
Hopefully this napkin math isn't too incorrect. My Kahorie sims do indeed show the elixirs as a roughly 60 dps increase over the rage flask.