from the rapid decisions to the almost psychic knowledge of their librarys contents, theres no other form of Magic that comes close
If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and South Wind Avatar's last ability will trigger only once
But theres literally too many other good ones for me to easily list
Death Tyant shines in combat, turning any creature death into 2/2 Zombie tokens
In Commander, this can be clutch against game-winning combos or planeswalker ultimates, and it fits especially well in decks that generate value from legendary creatures entering and leaving the battlefield
Anyway, back on topic, all Ramp decks since the beginning have looked to build their mana to ridiculous levels as quickly as possible and then use that advantage to drop more powerful win conditions earlier than their opponent and ride that to victory