They should really be compared to other on death/trash specific affixes (level 14 lol) as sanguine and bolstering do nothing on bosses.
Raging, spiteful, and bursting.
But yeah at the super high rank 1 key level sanguine, especially fort/sanguine, is the hardest to push due to it adding extra time. And bolstering adds too much threatening damage to survive if handled poorly.
Both are fine and able to be worked around for non-rank 1 keys though, so it’s a matter of who are they designed for.