One possible trick seems to be to only go for the ones at or near the gate(s), since most zombies will go for you if you're close enough and they haven't decided to head for the gate yet. At least that's what I've found.
I'll have to try that "hide behind the mausoleum" trick next time though and see if that works.
Just out of interest, is this quest actually doable using only ranged weapons? In theory it should be, but I suspect it'd be really hard with guns even for a gunfighter.
I didn't notice any difference between the plus and patch myself.
I did notice if you didn't attack certain zombies they would mill around and not be focused, If i ran behind the gravestones and not drew attention to me the numbers would be less at the gate. I tried sniping from a perch atop the stone fence as recommended, I tried only hitting certain types of zees as someone else mentioned, etc. Had best runs if I froze the gate focused zees and ran to the other gate and repeated. In the end however, all failed. Also, using the same tactic in back to back runs had different spawn rates per run, seemed very random so in the end I just skipped it. Still was fun tho, brilliant game and wesp mod
I was more disappointed i couldn't seduce the gravekeeper :P
I left through different doors each time and on the second run I saw a zombie walking into the house wall as I left; he glitched out right after that. I'm wondering just how random the inital spawn is; if maybe it could sometimes produce enough zombie that you can't win at all.
So: 1) it looks like the hiding trick should work and 2) there's all the info I have in case it does Wesp any good.
During the first few times when I did this quest, I couldn't figure out why I kept losing. I thought there was just one gate at the top which I needed to defend, because that's the only way that the quest would be fair.
I agree the quest is not easy but unless you are Nosferatu or completely lack any social skills there is another way.
In recent playthroughs I have managed without Celerity.