All of the ingredients that spawn in the open are on a fairly quick respawn. Once you take one, the spawner kicks in and tries to repopulate up to the max spawn in the area.
The perfect bananas spawn on apes in the Dragon Turtle champ spawn as well, there should be no shortage of silverback gorillas in that area.
The egg sacs spawn on Myrmidex drones, and the Queen has a large amount. The crystal shards spawn on the Warriors. There should be no shortage of these creatures to farm out in the pits, while having the added benefit of participating in a combat experience that offers a little more in the way of a dynamic experience to make the farming experience a little less tedious.
The spawn rate for the creatures in the South Britannia sea was already increased from where it started. I'd rather not overrun the area with mobs, so it becomes a death trap for fisherman (sort of like the way Moonglow bay used to be with regard to water elementals). There are already alternatives in place to summon these mobs on demand.
I'm not opposed to tweaking the rates up, but I'm apprehensive to just turn it up to 11 so six weeks from now thousands of ingredients are sitting in the back corner of someone's house. Plus, let's be honest Dot, I know you've got fat stacks of coin to pay for some upscale potions
Thanks for the notes about the T-Rex and the Gorilla.