WAR - 80~95%, similar to a MNK, almost always right when damage is dealt.
MNK - 80~95%, always when the first damage is dealt (usually waits until 90-95% if the first damage doesn't do enough).
WHM - 0~20%, if taking too long to kill; killing fast will cause it to not Benediction, even without stuns.
RDM -
50%-75%; doesn't really matter for most cases, the RDM should be silenced anyway, I believe the Xarcabard NMs are immune to silence, but that can easily be fixed with heavy melee damage and stuns.
BLM -
50%-75%; again, long as it's silenced, this 2h has no threat at all, and for Xarcabard when they are immune to silence, just have the BLM, DRK, BLU and/or RDM/DRK to watch it with Stun.
THF - 20~50%, usually tries to 2hr right around 50%,
could use same tactic as NIN, stun and WS spam the last 50%, works pretty well in cities when monsters are weak.
PLD - 20~50%, usually tries to 2hr right around 50%,
could use same tactic as NIN, stun and WS spam the last 50%, works pretty well in cities when monsters are weak.
DRK -
50%-75%; it can hurt, but it is absorbed by shadows anyway; until the smart BLM overnuke and feed 200+ HP a drain to the NM *raises hand*.
BRD - 80~95%, but lolSV.
RNG - 20~50%, almost impossible to avoid unless you instantly kill it during a single stun.
BST -
50%-75%; kill pet 1st, and if it uses 2h before resummoning pet, you get to kill your tank.
SAM - 50~80%, I think.
NIN - 0~20%, if taking too long to kill.
DRG - 80-95%, similar to a MNK, almost always right when damage is dealt.
SMN - 0~50%, they are weak so it's very easy to prevent 2hr at all by WSing @ 50%. I noticed they seem to 2hr about 2-3 seconds after reaching 50%