Farming proof of winner

Ok so I am looking for a smooth way to farm these.
Has anyone gotten to a good farm method?

I tried to do it with 3 chars, kill char B and C with char A, i get 2x proof of winner.
Kill char A with char B, again 1 proof of winner, but then when i try to kill char A with char C it doesnt drop any anymore. Same goes for the drops between B and C afterwards.

I have to wait some time before I can drop them again.
Any advanced PoW farmer to give me some advice?

Thanks :)

how about killing your twink,relog and repeat?

Relogging doesn't work, sad enough :p

you can't bypass it on justac, it's ~10min protection between kills same char, same for charisma from pvp in BG

relog helped only on webzen, I didn't try on chinese server

oh then you'll need to restart second client xD
that should work right?

As wsv says, nothing helps to reset the timer

restart won't help, but there is no problem to launch 3-4 clients

best dung for farming is second floor, you stay your farmer on center (kill boss before :) )
and log 3 twinks from one account and then second, third as you want
time of kill cooldown you have to waste to enter into dungeon and go to center
twinks need some preparations but it pays off, just need permission for them to enter this floor and good speed boots with quickness stone + free quickness chantra potion
you will run invincible with twink till to center of floor without problems

Yep and i still see bunch of 99x proof of winners ingame
i wonder how they do it