I think you should get some spell cards that ca make you fly and upgrade you like: Armored Ascension
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I agree u have too many raging goblins but still keep them in there so u have something to put out very easily.
I think this is a pretty good Deck but it can be improved with the right cards but u need to tell on the Deck description what kind of deck your going for then we can help you and give you pointers.
I honestly think u need to have less lands and get some different artifacts that help u get creatures or something cause what im seeing u get to much land and that gets in the way, so get rid of the artifacts and get more spells or creatures.