I thought he should be physically weak because of the high amounts of mana he can use. :P But I also think I should put agility as a C or B, so he can take advantage of his divinations. 

@ Raineh Daze: Yes, most of his history is settled with him faring through the sea, he, in fact, disappeared in the sea after making a boat with his magical voice. I thought a stream pool would be the right thing to use since his name means that, and even if it is a tranquil part of the river, he can make it hell incarnate with his voice. 

Basically, he can manipulate the 4 basic elements (Water, Fire, Air, Earth.) at will, using them to fight or whatever else, he can also bend metals but only to craft things, not to actually fight, as well as making divinations of the close future, having kind of an advantage over physical attackers.

About the Noble Phantasm, there are many theories on what the Sampo could be and one of them is the fact of giving unlimited resources, but I think an astrolabe letting out apples would be just ridiculous. -.-' That's why I was planning to only use it as a source of good luck and to help read the stars, but for an active form of usage of it I've thought of some, but those I think are too OP to use (One of the first I had were to let the Sampo change the class Caster was in, turning him into, lets say, a Saber with the base stats of such class.) so if you could help me a little, I'd appreciate it a lot! ^.^

P.D. I'm also bad at naming powers, so if you could help me with that too you'd be a real life saver.