I have lvl 3 engeneering, and lvl 2 of everything else. I've done everything I can find, except for the vines on the right, and the ruins in the bottom corner and haven't found out how to get the gong part out of the water so far.
I did find the gong part behind the vines at the top...
Haven't opend the crate yet either. (I don't have enough master builders yet)

Any help as to what to do next would be apreciated. Thank you.

I think your on your way. and a special stew found Here can get that piece out of the water instructions are in the guide Here

Any other questions feel free to PM me.:)