Did you know that the Cordak Blaster was meant to be submerged and fired in the water? Learned it from BZPower.
Anyway, answers to the topics I missed:
Matoran job question: I would be a Scholar in a Knowledge Tower.
Great Beings question: Well, this is tough. I can't really say. I think this is a question that has no answer; not meant to be answered at all, just to be left a mystery.