The only reason it "beats" it is because of the HoT mechanic and also the target limit that LoD is restricted to. If you're rolling EF on 7 people its going to do more healing than LoD. But without the 4 set it is harder to keep this up outside of CD's effectively, the other problem is unless it is consistent raid damage a lot of it is just going to overheal so what do we do? we EF instead of waste healing LoD'ing.
I personally LoD during AoE phases not EF, but during phases where maybe 1 or 2 are taking damage I'll EF them since LoD is a waste of healing.