There's no single 'best' booster because it depends entirely on whether you're drafting, collecting premium variants, or chasing specific Commander staples
Ministrant has the edge over Seraph because it provides the same number of sacrifice bodies while being cheaper, and even having 1 toughness is a benefit considering Skullclamp is a staple in all Sacrifice decks
rampage 1 (Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.) Trample
Chandra, Legacy ire is another Chandra, but arguably one you should be interested in picking up
These decks want to keep their life totals low to keep Deaths Shadows stats high, all while protecting their creatures and managing the opponents board with limited mana
Season of Weaving Today I learned that casting complex magic is known as weaving on Bloomburrow