Boss3 Test: Grimfiend

Next up for Boss3 testing: Grimfiend.  In this case I feel it is known pretty well how he works, but there is still to some extent some question.  In particular, Grim's demon form has a cooldown of 3 seconds, but lasts 12 seconds.  At max speed, how does this shake out?  Does he proc 3 times per demon form (at 3 seconds, 6s, and 9s), or does he proc 4 times (also on 12s)?

Here's the setup.

I'm ugly.

As you can see, my Grim has scatter (it's at 6), so there should be plenty of scatter to stop the boss proccing.  His crests are Bulwark 4, which won't change the test more than trivially.

Here's the result:

PD + GF damage.

63806836 damage.

Analysis: We want to figure out how many proc hits Grim does.  Grimfiend has Berserk 8 in demon form, but he starts human, and he is not berserk in human form.  So I am assuming that he will take the same 5s (estimated) to ramp up as any other normal hero.  PD is assumed to take 3 seconds.

Thus we have PD active for 177s.  He gets 5.0 HPS (all auto hits); 885 hits total.  Grimfiend gets 175s active, where he will get 875 auto hits.  Total auto hits: 1760.  Each one does 35000 damage, so these should have done 61600000 damage.  This leaves 2206836 damage unaccounted for, which must be Grim's proc damage.

We can divide by 35000 to get the total proc hits: 63.05.  We can divide that by 175 to get the proc's HPS: ~0.36.  This matches fairly well with the assumptions made by Mr_Perfect in his reddit thread.  (He derives .32 HPS.)

We can also calculated expected procs.  GF will proc first at around the 4 to 5 second mark.  (Why not 7 seconds?  He does not get energy from being hit, but the PD is ramping up and GF is swinging faster.)  Assume it's 4 seconds.  Then at that point he transitions to demon form every 15 seconds.  Thus he gets exactly 12 transformations to demon form during the course of the run.  In all of those transformations except the final one, he gets either 3 or 4 procs.  (This is what we want to know.)  So we know he should get either 36 proc hits, or 48 proc hits.  Obviously, 48 proc hits is closer to what we observe (63 hits).  So I guess he is getting all four procs as a demon.  But the estimate is still low.  What explains the additional 15 hits?

Should run this again.

OK, next day.  Same lineup.  Result:

More PD + GF damage.

64263405 damage.  This is .7% more than last time, that is, easily within experimental variance.  But it's higher, so it's in no way suggestive that my result last time (with extra 15 proc hits) was a fluke.  Not sure what's going on here.

UPDATE: UraniumSnail pm'ed me to suggest the GF has Berserk 8 in both forms.  The wikia page is unclear on that; I guess I assumed wrong.  That speeds him up by 2 seconds in the ramp-up at the start, thus adding 10 hits.  (Estimated, natch.)  This gets us close.