Formula
CommonFun.calcBuff_9030
function CommonFun.calcBuff_9030(srcUser, targetUser, a, b, c, d, lv, damage, param)
if srcUser == nil or targetUser == nil then
return 0
end
local layer = targetUser:GetBuffLayer(139381_1225_:MAX_STACK_0)
local A = 0.5
if 2 <= layer then
A = 0.5 / layer
end
return A
end