One of the things that has remained constant is the design on the back of Magic: The Gathering cards for obvious reasons, namely that you need to ensure that no matter what set a Magic card is from, it should be completely indistinguishable from any other card in a deck
(with purchase of any booster box) The sky isn't the limit
Apart from lands, ramp, draw, and removal, I would make the other categories "enablers" for cards like Awakening Zone and "payoffs" for cards like Dictate of Erebos You might notice you're not running too many ways to generate enough tokens and a tad too many sac outlets or payoffs that aren't triggering often enough
Thats a perfectly fine ability, and blue/black/red are great colors for milling and reanimation
The pump can help push through a bit of extra damage, though, and should get consideration for a cast before your attack step