Overview of Nebulite Bonuses

Been trying to get Sharp Eyes for a while now, and after 50 cubes in A rank, I've gotten every skill except Sharp Eyes. Been buying cube service off my all friends' accounts - they have logged in lots of accounts for me haha. The rate is BAD. I now know I was lucky to get HB in just 4 cubes @ A rank. The rate is very low and random.

Anyways, I talked to a guy who has used 70 cubes on B rank and still hasn't upgraded. < terrible terrible rate. He's now trying to sell his B nebulite giving up on it.

Huh, I got A rank in ~30 cubes, Got Haste 2x and Door 2x, Still gunna try for either HB or SE, whichever comes first i guess. The rates seem variable, But overall a little better than actual potential cubing for upgrading, (Possibly because of a smaller pool of items and the fact that its only 1 line)