You can't make an army like the Imperium and your creatures won't be as big as the Tyranids so you want to bide your time and wait come back from near death with a board wipe and a mass reanimation effect
Who / What / Where / When / Why 5W is like a lot of flexible cards in that it isnt really efficient at doing anything specifically because each mode costs one more mana than the general cost (1R is the general cost of a Shatter effect, but on What it costs 2R) aside from the Stream of Life mode on Who, which is pretty suboptimal
This is another enters the battlefield trigger, not a cast trigger - which means it works if youre flickering your enchantments, too
You want to cast a lot of spells each turn, be it cards like Faithless Looting, Tormenting Voice, or rituals, while having prowess creatures in play
Clock of Omens
With so many cards plotted, this can give you a full grip and then some