Cards like Unflinching Courage that can give it trample might also allow you to finish off some players, especially anyone running a token deck that creates a bunch of 1/1s
Aerith, Last Ancient Lifegain decks are always on the hunt for payoffs that make gaining life worthwhile since doing so doesnt impact the board
Just keep in mind that the rules regarding copying spells and effects on the stack arent easy to grasp, and many a playgroup gets them wrong, even with practice
Theres also Crystal Ball and Brain in a Jar for a bit of extra Scrying
At the beginning of each of your upkeeps, you put a counter on it, and then, when it hit eight counters, you create eight 'Replicated Ring' artifacts that all tap also tap for one snow mana of any color
My gut and limited experience with the format suggests that vampires is missing the aggressive support it needs to function and this suffers for being unable to effectively block Decayed zombies