Once the first Sanguine Bond was played, I sacked the two Sunspring Expeditions Id had ready and waiting on the table for most of the game, which created a 32-point life-swap thanks to the double Boon Reflections
It does require you to develop your battlefield to be especially meaningful, so its not oppressive on its own, and the inclusion of just one extra-turn effect significantly expands the range of things that can happen in a game
Different types of ramp cards are better depending on the type of deck you play
Counter spells to remove the treat before it ever has a chance to resolve Artifact removal: Vandalblast, Gemrazer, Abrade, Disenchant, etc
Vito, Thorn of the Dusk Rose Exquisite Blood plus Vito, Thorn of the Dusk Rose is the name of the game for life-based combo decks