considering the fact that most hammers will have pub setting of 10 K minimum (spirit, shako, eni, hoto or wizzy and other ..) this wil roghly turn to ~2000 dmg per hammer.
..does extra life make any real difference if you reach 6.5K life?
even my crappy nec does ~5K spear dependig on gear, and that's about ~1000 dmg.
I am no master dueler (or anywher close for that matter) but if 400 is the diffrence between pure vita and non pure, I don't see why not go for more flexible build that can cope with different situations, as Ce Olba stated, this really don't do much. Only time I can see where it comes to close match that you will need extra life is OW situations.