I've done this quest (however died 3 or 4 times

), however I think its crazy idea to do such quests.
1st, it's pain to kill 10 apes in high-population server.
2nd, worms are too powerful, and you're not prepared for fight when they aggro.
3rd, their location are very close to another spawns - Cannibals and Apes.
4th - quest location is on a crossroads where players do many quests. On PvP server you can be easily ganked during the quest.
5th - someone can tap your mob and kill it; quest will be failed.
Very badly designed quest. Just put the quest rock inside Cannibal cave. Easy as pie but still hard to undestand by FC designers. Damn.