Very nice idea, though for disc DA will still be calculated off of the full heal.
Maybe allowing both masteries, DA and EoL, a separate overheal% would fix that? Because in my spreadsheet they are built into each individual spell...
When I looked into HolyCalcs this weekend, I didn't see anything like that, but maybe I just overlooked it: Is it possible to evaluate the T90 talents against each other?
I made a chart, considering H/CD for all three spells, depending on the distance between targets (will post it as soon as I'm home) and it showed DS to be clearly superior to the other options (of course that doesn't take into consideration the filler spells you lose due to more GCDs on DS), only overtaken by Cascade once DS cant reach its/enough targets. Halo is practically never that strong, even in 10man where it and DS are already AoE capped and Cascade could still hit 5 more targets. Considering the fact that Cascade is smart after the initial cast and halo would either require everyone to be in one spot, but then DS would overtake it, or nicely spread in a circle around the priest. The only real advantages I see are the lowest number of GCDs used and its burstiness (but that could also be a disadvantage depending on the fight).
There are only 10 types of people... those who understand binary and those who don't.
It's probably not a bad idea for when I do a general update for inputs to my healer sheets. Just for cleanliless, I'd probably break it down a little more loosely, maybe an overheal % for each of direct heals, smart heals, shields, and HoTs.
You can change the L90 talent in the dropdown, although this slightly affects casting ratios since they have different cooldowns. Someone pointed out earlier that that "effectiveness ratio" of each really varies (in particular I think Halo would tend to be a lot less perfect than Cascade in real use) so you should probably change that too.
Quick update for last night's Disc mastery changes.
Like I mentioned before, the main point of the sheet is mostly for me to have spell numbers handy that I tweak however I want for doing the sorts of comparisons reflected in what I post on the Disc thread and elsewhere. Ensuring user-friendliness isn't a huge priority yet (in some ways I got a bit ahead of myself when I posted it publicly here), but since Tecton was nice enough to do a basic item pass, anyone who wants should still be able to use it on their own with only a couple minutes of tinkering to learn how it works.