Originally Posted by
voidspark
Well, unfortunately when it comes to spreadsheets that's the best way to go, because otherwise your number of scenarios will be enormous, and the differences (even between say 50% and 65% overheal) so small that you're just splitting hairs at that point. At best, one could come up with several different scenarios: High tank versus high raid damage, and 10 versus 25.
So let's assume 20% Light of Dawn overheal, 30% Word of Glory initial hit overheal, and 55% Eternal Flame tick overheal (this might be generous for EF). Then at 50% Beacon overheal, Light of Dawn will pass Eternal Flame.
This is assuming nothing is healing your Beacon target (except Beacon), and that your EF HoT is going on a different person each time. Obviously if you put EF on yourself it would be higher, and if you put EF on the Beacon and/or overlapped the HoTs it would be lower.