I think I can answer the question about all his abilities as well. In the old celtic tales of Lugh, he was a jack of all trades so to speak. Except unlike most jack of all trades, he was really good at all of them. That would probably explain the amount of abilities he gets.
As far as the forge bonus goes... I may be confusing him with another diety here, but I believe in the Tuatha's struggle with the Fomorians, he forged the weapons used by the tuatha?
Oh one more thing about the weird placement of the spear in the graphic. Lugh's spear had a life of it's own. In combat he would wield a sling "The Rainbow" and his spear would fight next to him. That is why it is floating next to him.
Also! The awe and the fireshield probably have to do with him being known as the radiant. There is a wonderful description of him in an old celtic tale where the druids describe him as the sun rising in the west. I love the way the celts described their heroes
