I just popped this even though it has not yet synced with TA atm.
Anyway so to sum this achevo up ppl have been having a problem with.
Its mostly been a big misunderstanding.
To get this achievement : You must attack Yordo until he FIRST summons his gurads around himself.
Then after which they will disappear.
repeat this process but the second time YOUR opportunity will present itself.
Yordo will then summon his guards again but this time they will be coming from angles.
trying forward spear you. THIS IS THE MOMENT TO DO NOTHING BUT DIE.
its not worded that yordos guards surrounding you is in fact an ability he has.
YOU CANNOT EARN THIS BY JUST SIMPLY DIEING IN COMBAT SURROUND
Yordo MUST use the ablilty to summon them around you.