While I like to say I enjoy and think scholar strats are really useful, I believe that our Dark Arts stratagem could be given more thought. With the introduction to Penance along with the +1 & +2 gloves it makes things like Regen or Refresh useful to use on you or other people; it's like a mini composure. But Immanence itself is a handful due to the fact that its hard to time or get the time right to attempt to make a skill-chain with your magic that you cast. In Abyssea where you fight monster or notorious monsters it does not seem logical to use since you have Parsimony or Ebullience which are way more useful.
On that note, I'd like to see what you guys think about a stratagem for both Light & Dark Arts maybe for Level 99. Personally I don't know what would be nice for Light Arts seeing how I'm really satisfied with what we have. As for Dark Arts I have one suggestion, a "Manifestation" like effect on Elemental Magic. That's one thing we lack, the ability to Area of Effect our nukes. In situations like box farming in Abyssea it would be nice, as well as making it also Yellow Stagger trigger-able.
Another one I thought of is something like "Weakening elemental resistance based on the spell you cast." It would be similar to the -Ja spells. Some of you may think that's making it unbalanced, but you could make the strats' cost 2 instead 1, or something in that area to make it fair. This is just me thinking of different stuff, and I'm interested to what other Scholars think about it as well as post more ideas.