You should read the sticky in Deck Help. Most importantly we don't know what the goal of your deck is, deckbuilding-wise and opponent-wise.
Overdrive is a stallbreaker card, even more so when combined with Dolls. You've built this like a rush, but it'll get outrushed by actual rushes. Purify would not be a waste if you intend to fight in PvP or Arena, but 2 will suffice considering your high damage output (eventually). If you want to stand a chance against rushes, you can modify it to add a bunch of CC. If you want it to break stalls better, you need more copies of Dolls and OD's. 3 of them might not be enough, even if Epi helps a ton. Precogs are the #1 choice to remove first, of course.