Enough life will reliably let you hold out against that assault, but I like to get up to 22 or so mana links before I risk much fighting against these
Im thinking of channel lands like Takenuma, Abandoned Mire as a solid choice of recursion for Pulse of Murasa
Each time you gain life, such as each time a lifelinking creature deals damage, you may pay two mana to draw a card
You can use his Unearthly Power ability to discount your expensive cascade spells while creating more bodies when he deals combat damage
Following this idea, if you include Nemesis Mask in your deck, it forces all of your opponents' creatures to block Anti-Venom
When many decks are drawing completely dead against a three-drop, that's a strong incentive to find a way to play it or at least sideboard it, even if your deck suffers quite a bit while the card is in play