Two mana outlay with essentially a free card thereafter is really good
Fortunately the underlying chassis of the deck is flexible enough that you cant really go wrong, so I recommend experimenting with a few different builds before you settle on your personal favorite
Now, on December 17, near mint specimens are going for up to $195
Your best bet to pull it off is to play a commander like Selenia, Dark Angel that allows you to lose life on demand or have cards like Wall of Blood in play
This deck already has two artifact cost reducers (Enthusiastic Mechanaut and Etherium Sculptor), so the third is pretty redundant, and Cloud Key is the worst of these effect due to its cost
To make a good deck, you want to focus on just a few strategies instead of all different cards and no real plan