help making this shit 
Wiki says
Fortify Enchanting Blue Butterfly Wing Snowberries
Fortify Smithing Blisterwort Glowing Mushroom
I realized just today is that there is no set number that corresponds to the item improvement ranks. So when you have a weapon all the way up to (Legendary), it can still vary between kinda-crappy-legendary and legendary-legendary. I've crafted a set of smithing bonus apparel (armor, bracers, ring I believe) and when I'm wearing it, I get better results than when I'm not, even though my base smithing stat is 100 and it already shows up as Legendary when I vanilla improve something. You can make crazy powerful things when you boost everything up with gear and potions.
The 100 enchanting perk is by far the best Master level perk in the game.