Trial: Defeat a set number of experience-yielding monsters under the prescribed weather conditions, or on the corresponding day of the week.
Objective: Defeat 300 monsters of the Beast family.
Equipment: Kila must be equipped.
Uleguerand Range : (Very rare that lightning weather pops here) Seems like this would be best. Plenty of Variable Hare (58-61) and Uleguerand Tiger (61-64) right at the beginning of the zone. All 5 min repops.
The Boyahda Tree : Can have lightning weather, and there are 44 Level 62-66 Moss Eater in the zone.
Caedarva Mire : Can have lightning weather, and there are 14 Level 68-70 Wild Karakul in the zone.
La Vaule (S) : Can have lightning weather, and there are 14 Level 75-78 Fighting Smilodon in the zone. Shares weather with Jugner Forest (S).
Vunkerl Inlet (S) : Has fairly regular lightning weather, and 6 Level 67-70 Fierce Smilodon (I-7)-(I-8) with 5 min respawn and various Gigas's Tiger throughout the zone.
Labyrinth of Onzozo : No lightning weather, but 17 Level 70-73 Torama and 6 Level 71-74 Labyrinth Manticore in the north section of the zone.
Jugner Forest (S) : War Smilodon 3 or 4 pop every 5 minutes on side of river where you teleport to for Jugner Forest (S) campaign battle. Thunder weather fairly frequent. Another 2 or 3 pop on other side of river. With a partner you can clean up since getting back to other side not an option once you cross. Shares weather with La Vaule (S).