[lightspark]

Use UnitPower's 3 arg to get unmodified values.

local mod = UnitPowerDisplayMod(8) -- returns 10
local cur_mod = UnitPower("player", 8) -- let's say it returns 15
local cur_unmod = UnitPower("player", 8, true) -- will return 150

You can divide unmodified value by modifier later, when you need to do so.