I like the deck. I am currently thinking of a mardu reveler list my own.
I think the main deck is almost fine except the mana base. I guess you choosed
wooded foothills as you don't have
arid mesa.
Beside that, I would highly reccomend one
westvale abbey. Your pyromancer, and your
lingering souls will generate so many tokens, that you will have 5 creatures to sacrifice into the abbey in many games.
Also having a manland for some occasions is helpful, too. You can put one
shambling vent inside for more lifegain.
BR, Chris