I think now its quite better, im glad to help with your deck
In my opinion now maybe the
Cliffhaven Vampire it's quite expensive 'cause its a little creature (with a good hability) but really weak for 4 mana, and well if u want to improve it more try to search cards which have synergy with atheros. Atheros it's a awsome card, i really love it, in my deck he have synergy with Filgree Familiar, but there are many cards. Just play, improve and have fun with your deck bro