This decks lacks of
quanta. Having only 4 pillars and no mark makes you depend in a very kind RNG to play 1-2 card early, assuming there will be no PC in your pillars. Having 3 different 0-cost cards makes them even more difficult to get.
This decks relies on skeles and only 3 Vultures as main damage source, what is pretty low, even more considering there is a single Bone Wall as defense. Also, using Pandemonium can kill or lobotomize your kittens, so I wouldn't suggest it even as a last resource.
I suggest making a more focused deck, I may post one soon.
You can do through 2 general ways to generate
quanta: Soul Catchers+
pillars or splitting mark and pillars/pendulums. With SC, you will get a much higher quanta, but you may have bad draws getting only pillars with no SC or vice versa. With pendulums you will have more quanta consistence but a lower quanta/turns ratio.
If you go for SC, I suggest you a bunch of Dragons for attack (even if they are played in mid-late game) and 3-4 Bone Walls.
If you choose for pillars/pends and no SC, I suggest Bone Walls, Vultures/Mummies and maybe a pair of Boneyards to counter another Bone Wall decks with no yards.
No matter your choice, Arsenic and Discord are both neat in this decks. Arsenic offers a consistent and sticky damage source in case you are CCd and Discord completely breaks most monos and duos if you get one early (when I use discord, I use to pack 3, no less)