You have to decorate all 3 spots for the 'make the cave look good' objective, I tried after doing two and the butler told me it still wasn't done.

After the quest you can talk to the chef and he'll offer you a reward for killing the Cave Wolf Matriarch (still lvl 283). The attacks are exactly the same except they do 5x more damage. The most efficient way to kill her is probably by using range/magic so you can hit her and run to avoid her magical attacks and not have to deal with her hard melee hits.  The magic ball attack can hit 250+, falling stalagmites can range from 70 to 210 depending on how many hit you (each hitting 70 with a max of 4 hitting you), melee is again 250+ so it's a good idea to avoid getting close. The juvenile wolves (lvl 73 I think?) are back and will also attack you with melee, hitting a max around 100.

Matriarch drops a skull and nothing else, juvenile wolves drop wolf bones only. Take the skull back to the chef and he'll offer you 2k pure essence, 3.5k flax, 300 ground dragon scales, or 100 ground unicorn horns. Right now 3.5k flax being the most valuable at a nice 210k, pretty sweet for a 5-10 minute fight. Sadly it isn't repeatable, probably should've taken some pictures :/.

After getting the elder monkeys to tell you about the snakes, nuts, and banana, you can get the snake corpses immediately and stuff them without having the elders eat your ingredients to save time. After you stuff the snake and go back to the elders it skips over them stealing your ingredients which means 2 less annoying chats and they immediately tell you how to cook the snakes.

At the least, the guide should say to talk to the elders again after they say to go get the right banana, thus they also tell you your nuts are bad. Then you can skip an entire trip back to them and get both.

Its not a big deal but "sat sapienti" means "enough for the wise".  It'd be enough for a wise man if it was "sat sapient vir", vir meaning man and sapient being the singular case.

It should be mentioned that you can collect both the scorpion at the barbarian outpost and at the monastery without having to get the locations from a seer, though you have to talk to the seer about the taverly dungeon scorpion or you can't open the wall its hidden behind. If you don't have to do the barcrawl this makes the quest extremely short.

Jagex removed both the skeleton and the broom making it a pain to find the hidden portal at rogues castle. Now its 2 steps east from some stacked crates.