Just a quick thought on Quantum Pillars...
They give 3x as much Quantum as a normal pillar, but their penalty is that the quanta they give is entirely random?
Maybe they should give 1d3 quantum each turn? Or maybe that weakens them too much, what about, 1d5 random quantum?
1 - 17%
2 - 25%
3 - 28%
4 - 18%
5 - 12%
Still completely random, though.