I don't play much EDH, but something like
Rashmi, Eternities Crafter would go nicely with Vial Smasher. I also imagine cards with suspend would be sweet, since when they come off suspend they are cast, so it can trigger a big Vial smasher without investing a lot of mana. Grater Gargadon and
Deep-Sea Kraken come to mind. I guess you could also do delve cards for the same reason, like
Murderous Cut, Tomb Stalker and Tasigur since their mana cost is huge, but you're able to play them for a lot less.
Just something to think about!