You HAVE to go to Nelveska Temple!
Yes, you definitely should get Worker 8, although you might consider getting rid of him after a while. You have to keep him long enough to get through the scene at Nelveska Temple. I am not sure exactly how far into this chain of events you are, so I'll start at the beginning.
1. Zeltennia Castle bar: listen to rumor about Cursed Island. That'll show you where Nelveska Temple is, but you can't go there yet.
2. Zarghidas Trade City: buy a flower from the flower girl.
3. Goug Machine City: Mustadio's father has discovered a large steel object.
4. Goland Coal City bar: listen to rumor about Ghost of Colliery.
5. Lesalia Imperial Capital: talk to Beowulf and help him on his quest for the Holy Grail... I mean Holy Dragon :D
6. Goland Coal City: fight battles in the Underground of Colliery, recruit the Holy Dragon.
7. Goug Machine City: the Zodiac stone will turn the mysterious steel ball into Worker 8.
8. Nelveska Temple: Here's where Worker 8 comes in real handy... or you can use the Holy Dragon for this trick instead. Move one of the gigantic party members next to each of the 2 pillars where the Hyudras were perched. Climb on top of the pillars with a 'Treasure Hunter/Searcher'. This 'searcher' must have: Move-find-item, Jump of at least 4, and a very low brave (10-20 is best). You will find a super Javelin and super Escutcheon in the pillars. These are some of the best items in the game. Check your item list after the battle and make sure you got the right ones. If not, reset and try again!!!
After this tough battle it is your choice whether or not to keep Worker 8. I personally don't use him much, but he is a unique character and kind of funny looking :cool: . Now go get Cloud!!!! :chop:
Off topic: Congratulations on beating Velius!!! :evilking: