* Bastion invasion waves.

Prob should keep alexandrite away from group battle systems especially ones not incorporating the expansion the item originated from. Although I could see potential for a besieged/salvage point system based on performance in either event. Would allow for players who aren't lucky with drops from gears/bosses to obtain some after obtaining a set amount of points, think in the lines of Ichor but add different pouches. (10~25 Alexandrite pouch, 30~45 Alexandrite pouch) allows players to still obtain the current pouches during runs but also speed up process based on effort and not just luck.

* Gears, Chariots, Spheres and Acroliths populating Abyssea.

Eh, my stance on drops just like in my comment on previous idea, keep it to area of origin (aka ToAU areas).

* Cotton and Linen Coin Purses on Nyzul Isle Investigation bosses (floors 20,40,60,80,100)

This would be great! Nyzul Isle is technically a part of the ruins and almost each floor holds at least 1 gate (could let singles drop from gates/chariots/gears). And adding an incentive to doing bosses (cause lets face it, nyzul gear has been out shined like much of its predecessors by emp/abyssea gear) as many people either have sets/individual pieces of worthwhile nyzul gear.