Is it required or recommended reading before heading into Final Crisis? The Omnibus is huge, is it all recommended in your opinion?

Here's whats in the Omnibus-

Seven Soldiers (2005) #0
Seven Soldiers (2005) #1
Seven Soldiers: Bulleteer (2006) #1
Seven Soldiers: Bulleteer (2006) #2
Seven Soldiers: Bulleteer (2006) #3
Seven Soldiers: Bulleteer (2006) #4
Seven Soldiers: Frankenstein (2006) #1
Seven Soldiers: Frankenstein (2006) #2
Seven Soldiers: Frankenstein (2006) #3
Seven Soldiers: Frankenstein (2006) #4
Seven Soldiers: Guardian (2005) #1
Seven Soldiers: Guardian (2005) #2
Seven Soldiers: Guardian (2005) #3
Seven Soldiers: Guardian (2005) #4
Seven Soldiers: Klarion the Witch Boy (2005) #1
Seven Soldiers: Klarion the Witch Boy (2005) #2
Seven Soldiers: Klarion the Witch Boy (2005) #3
Seven Soldiers: Klarion the Witch Boy (2005) #4
Seven Soldiers: Mister Miracle (2005) #1
Seven Soldiers: Mister Miracle (2005) #2
Seven Soldiers: Mister Miracle (2005) #3
Seven Soldiers: Mister Miracle (2005) #4
Seven Soldiers: Shining Knight (2005) #1
Seven Soldiers: Shining Knight (2005) #2
Seven Soldiers: Shining Knight (2005) #3
Seven Soldiers: Shining Knight (2005) #4
Seven Soldiers: Zatanna (2005) #1
Seven Soldiers: Zatanna (2005) #2
Seven Soldiers: Zatanna (2005) #3
Seven Soldiers: Zatanna (2005) #4