We should scan the tooltip instead on relying on the talents

C_TooltipInfo.GetUnitAura is only available in TWW
Weakauras has a function but their code is GPL licensed

You mean to make it more reliable which level of mana spring totem is active?

No, to handle the improved spells

In the current state of the addon if we don't have improved spells and we have the buff from another player with the improved spell, we are reporting the wrong amount