The droprate on these seem to be relatively good, from what LS members and friends report as well as my experience with getting it.
Dropped 2/2 full drops (Incl. G.Sword) for us on Last Quarter Moon 60%, two rdm/nin duo kite around the tower just south of Al zahbi zone (Postern) for first fight, soloed second, thf/whm (lvl 46) spammed Dia/Banish/Mug for TH2 proc.
Mob details:
Mob Iriz Ima: Maroon Seal (T2 Maroon group) ZNM > Marid (Hits hard, walks slow)
Slower than player speed. Fight takes about 1 hour + 45 min solo if you're conservative with MP, he spams barrier, 40-50% of nukes became resisted if spammed.
Can be done without movement gear, but you might need to let Bio or poison slide for a round if you are not used to kiting. Poison was resisted a bit at the end, but with enfeeble gear, lands 1/2, 1/3 at the very worst.
Edited, Jul 3rd 2008 1:04am by Skairin