Vedalken Archmage seems like it go off here, especially with
Etherium Sculptor. Other than that, deck seems sweet. If you do go with Archmage, it may be worth having the whole station combo (all 4 stations in play is auto win) as a backup win con.
As for your sideboard, if you're bringing in
Grinding station, maybe consider
Myr Retriever. If you have one in graveyard and one in play, you can cycle them through the station for 2 mana at a time (or less with
Etherium Sculptor). Just another combo idea you could throw in.