First off
Nature's Jolt is part of the starting path to Summoner and you gain no benefit to count towards the AP requirement's, just about 0 reason to be taking it anyways if it means spending extra AP as well.
Second
Fluid healing is only useable on Acolyte so it makes sense in that regard, and would only maybe open like 1 new skill tree path that could be made
( Even Mage's Fluid healing counts towards an archetype )