Defeat 200 experience yielding Vermin type mobs under Fire Day or Weather condition Soulsaber must be equipped
Augment: Damage +14 Delay -10 STR+4 Attack +12
The area spanning (J-4) to (J-6) of Jugner Forest (S) has several Biddybugs and makes a good solo camp. Biddybugs have at most 3000 HP and are fairly weak for level 85 - 90 jobs with access to piercing damage.
Grauberg (S) has a cluster of Chigoe spawns in the (H-11), (I-11), and (J-11) areas. A Blue Mage can make quick work of these using AoE attacks like Whirl of Rage and Benthic Typhoon, which should or nearly one-shot them. It should be noted that kills from actions that automatically defeat the Chigoe (critical hits, Dancer's steps, etc) will not count towards the trial. Additionally, the NM Chigoe, Sarcopsylla, spawns in this area, which adds a further danger. It will be the third Chigoe in a normal group of two.