You seem to have a lot of artifact search but not a lot of artifacts to target. All in all I see you have a Wurmcoil Engine which is good for recycling when he dies, 2 Molten-Tail Masticores, and even a Mindslaver which is also good for it's recycle value. You've got 8 locus cards, four of which will add LOTS of mana, so I'd take advantage of that and add some big fatties.You have some artifact creatures that would be in your graveyard for your Molten-Tail Masticore to target, but if you have 4 Myr Retrievers constantly emptying your graveyard it might be tough at times to use his ability. Myr Welder is nice, but he doesn't go well with the rest of the deck. If he exiles all your stuff, you wont have anything to recycle back to your hand/battlefield.