My spell power is 31582, so halo should be:
min: 15163+1,95*31582 = 76747
max: 25270+1,95*31582 = 86854
87398 - 97232 on screenshot (http://imgur.com/a/UPHbX) - it was at max range
not sure but i think the radius is wrong, maybe 27-28 instead of 30.
And now the max damage/healing was at max range. The max damage/healing should be 10% at 0yd, 100% at 27yd, then down to 88% at 30yd.
[spoiler=How it should be ]http://www.db.pandawow.me?spell=120517/halo#comments - comment from wowhead
The math is wrong for some of the ranges. Here is the correct scaling as per the formula
( 0.5 * (1.01)^(-1 * (((Distance-25)/2)^4)) + 0.1 + 0.015*Distance)
Range 1 || Damage 11.50%
Range 2 || Damage 13.00%
Range 3 || Damage 14.50%
Range 4 || Damage 16.00%
Range 5 || Damage 17.50%
Range 6 || Damage 19.00%
Range 7 || Damage 20.50%
Range 8 || Damage 22.00%
Range 9 || Damage 23.50%
Range 10 || Damage 25.00%
Range 11 || Damage 26.50%
Range 12 || Damage 28.00%
Range 13 || Damage 29.50%
Range 14 || Damage 31.01%
Range 15 || Damage 32.60%
Range 16 || Damage 34.85%
Range 17 || Damage 39.41%
Range 18 || Damage 48.23%
Range 19 || Damage 60.83%
Range 20 || Damage 73.90%
Range 21 || Damage 84.14%
Range 22 || Damage 90.54%
Range 23 || Damage 94.00%
Range 24 || Damage 95.97%
Range 25 || Damage 97.50%
Range 26 || Damage 98.97%
Range 27 || Damage 100.00%
Range 28 || Damage 99.54%
Range 29 || Damage 96.14%
Range 30 || Damage 88.90%