I do have a few suggestions for you that may give you some new ideas for this deck:
1) Firstly your choice for mono- Green was an interesting choice. If you add BLUE to this deck then you'll be able to use cards that have an affinity for artifacts. This way you can play your artifact spells and get an incentive for doing so.
Assert authority would be a cheaper way of playing
cancel,
Chromescale drake helps you get your artifacts faster,
Into thin air returns something you want to save and
Quicksilver behemoth saves itself after combat.
2) Secondly
Worldslayer's effect only works if the creature deals damage so you'll want to give it to a creature that either has trample, flying or unblockable. Personally green would be good at this and it wouldn't be hard to find an artifact creature that has that effect But Blue & White would probably
serve you best in that regard. Also if you add white then you can play
indestructibility and
gift of immortality.
3) Lastly your signature card in this deck is an artifact that can destroy EVERYTHING. You'll not only want to play around this but you'll want to use this to your advantage. It destroys all permanents (including lands) so if you can find some indestructible mana sources then it would greatly help. Also if you added creatures that had PERSIST or UNDYING then you'll have an army of creatures that's ready for a swing to win the game AFTER you've already wiped the board. A great card to add to this deck (if you do play blue) would be to add
psychic spiral. This way every single card in your graveyard that just got sent their, and throughout the game for that matter, can all be returned BACK to your deck. This way you can destroy all you want and not worry because you'll have deck recursion.
All of these suggestions were made with the idea of blue but if you don't choose to go this route then you can still use similar tactics with cards that fit this mechanic. Also if you're going to be blowing up fields then try some recursion tactics for your own deck and maybe implementing some discard and/mill against your opponent. This way they don't top deck into what they need or save anything in their hands for after you board wipe the field. These are just some ideas that I had, I hope that they help.