The one fundamental thing I was noticing about constructed when compared to cube is how many games were won or lost based on running out of gas
Progenitor Mimic - This one is cheating a little because it's more a clone than a token generator on ETB, but by flickering, you can routinely change up what kinds of tokens you're making, which is always a big help
Artifact Color tag templates(None) Eye of Ojer Taq : Add one mana of any color
Lifelink, unlike trample, works even when youre blocking, so you can use it to not only send your opponents creature packing with its +3/+0 , but also recoup some lost life or create a buffer
Removal like Path to Exile and Reckless Rage keeps the path clear for your creatures to get in, and youve even got big splashy finishers like Soul's Fire or Chandra's Ignition to convert all your buffs into a huge burst of damage