Ok just had an idea

Since revamping the respawn timers might be a deal breaker, why not make Khim/Cerb/Hydra be force popped? I got the whole idea planned out too...

Their pop items come from their ZNM counterparts, and here are the pop items, where they come from, and what their ingame models could look like. (Please consider this SE :>)

First up is Cerberus' pop item, the Honey Cake. The reason behind the name is that in Greek mythology, Cerberus was lured away and also drugged by a honey cake so that a Greek character who's name escapes me, could get into the underworld.

http://static.ffxiah.com/images/icon/5657.png

Name: Honey Cake

Description: A known favorite of the notorious Cerberus. Allegedly irresistible enough to draw the horrific hound out of hiding.

How to obtain: Dropped from Sarameya.

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Second up is Khimaira's pop item, the Succulent slab. Now I had no information to go off of for this one, considering there wasn't much detailing what the beasty liked in any form of mythology, so I decided to use a piece of meat.

http://static.ffxiah.com/images/icon/4372.png

Name: Succulent Slab

Description: A known favorite of the notorious Khimaira. Allegedly irresistible enough to draw the maned menace out of hiding.

How to obtain: ZNM Tyger.

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Finally we come to the last pop item, the Amymone Water. This one comes from the abode of the Hydra in the Labours of Hercules, whom slew the beast as his second Labour.

http://static.ffxiah.com/images/icon/4140.png

Name: Amymone Water

Description: A known favorite of the notorious Hydra. Allegedly irresistible enough to draw the multi-headed monster out of hiding.

How to obtain: ZNM Tinnin.

Please consider this ._.