I would say Mantids is the most reliable way since their drop pool is very limited, but many places have a similar mid-factions drop pool. Your options are:
- Kill Mantids.
- Farm/Chest run Kappas in the Undercity.
- Farm/Chest run in Napuhi Quarter (Mission)/Tahnnakai Temple (Explorable)
- Farm/Chest run Vermin outside Senju.
Mantids is probably the easiest and quickest, Kappas are the most rewarding because of the value of a Kappa shield, and Vermin are a good middle ground.
HM for more drops, NM if you wanna try for q8 as well, although that will mean that mantids are kind of off the table since they are a real pain to ball and kill in NM. NM easiest and most mobs is probably Vermin.
