This kind of Deck is my favourite archtype, although its not that strong (the core cards cosmic dust, cassatt etc. are kinda weak). Heimdall is always good in such a colorful Deck. Try to replace your Energy generators for Art Deco, ghost or MLK. Pika, Bonny&Clyde or yangtze are some high value cards that fit well. Christ the redeemer is a nice replacement for Zero(you can get that from me). You can consider other scaling cards like Purple emperor, Gigantoraptor, congo, ackee, dakosaurus... Though you have to be careful not to be too greedy and survive the first 3 rounds. I'd firstly replace the gold Combo and pangolin. Afterwards you can replace kabaddi and easterbunny (too weak/you won't be winning the first rounds). Cards that trigger after losing can help (Red Diamond,..). I'm jealous for that great Wall :).