Burn Question : Modern

This is my deck list:

Creature (20)

4x Goblin Guide 4x Hellspark Elemental 4x Spark Elemental 4x Vexing Devil 4x Eidolon

Land (16)

16x Mountain

Instant (16)

4x Lightning Bolt 4x Thunderous Wrath 4x Searing Blaze 4x Shard Volley

Sorcery (8)

4x Lava Spike 4x Rift Bolt

Sideboard (15)

4x Blood Knight 3x Blood Moon 4x Leyline of Punishment 4x Skullcrack

I was wondering if i should play the thunderous wrath or if i should replace it with something else. Whats your opinion?