I also cant see running Serra Ascendant being a bad idea
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Fabled hero isn't viable considering enchantments don't target the creature drop him for your choice of Skyhunter Skirmisher, Mirran Crusader or, Silverblade Paladin whichever peaks your interest i would suggest siding the crusader
High tide speeds up the deck alot your choice on whether or not you need it
Your missing an elixir of immortality without the elixir you draw put one on top of library then you have 2 turns or you draw out with elixir you can shuffle your grave (entire deck) back into your deck