You have no two mana creatures witch in todays meta unfortunately you need them, there more important then 1 mana drops. You should defently read
smuggler's copter's ability cause he woulld be good for your deck as well, plus that other artifact
scrap something, i can never remember the name but they would be great for you in this also
Unlicensed Disintegration if you use all those artifacts is a great card for this deck as well and if you run those amount of artifacts that i told you, i would use 3-4 of
Unlicensed Disintegration. Check out this old hall of famers post on
channel fireball he explains things good for madness but its an older post
http://www.channelfireball.com/articles/falkenrath-gorger-in-redblack-madness/ and check out some of the other decks on here as well. You have a pretty good basis so far though.