One of two things needs to happen to these items.
1) BFT does current% health
2) void staff is removed from Dominion and BFT stays the same.
These two items alone leave you with no survivability, If you get health BFT does more dmg if you get MR 35% of it is ignored along with the base MRPEN on BFT.
As far as I know BFT was created for TT and it works great there because there are only 3 champs, there are 5 in dominion. There is already enough damage from those 5 champs to focus someone down, there are plenty of items that give lots of damage for a fairly low cost too.
once someone has both of those items you can't build any form of survivabilty, you are now equivalent to a squishy.