Once you get 760 pts in the EF theme, then you can collect the rest of your points from any area....you don't have to specifically get 760 EF pts over and over again to purchase multiple pieces of the set. I have both the Malevolent BP and Greaves, and I have a total of 828 pts earned in EF so far.
That said, this BP is an excellent upgrade to the Death Embracer's Chestplate from BB. The combos listed above are all excellent ideas for upgrades, and I am working on points for the slot 2 & 3 augs now.