The only one I used since I always a had a mage was the crystal shield which was amazing!! (Party Heal is ridiculously awesome for boss battles)
I never tend to use charged equipment either since I stow it and rarely take it out. and that goes for all games I play.
However when I push myself to utilize the skills and magicks it always adds new potency to my playthrough. Especially at higher levels.
in LOG2 I would save it all for the shield though and get it asap. Boss fights become very easy with it and if you track how they placed the red crystals their seems to be intent there.
In fact most everything has been intentionally laid out as far as I can tell for a use if one chooses to or has the skill to use it.
It is interesting that they have magicks with no charge and others that have charge. It is a bit of a puzzle for me to see some of them such as the lightning wand which has shock on it but also hits for shock damage??