Been putting some thought into Glyph of Guard. On the surface it's primary use is obvious, increase the amount you can absorb on magic heavy fights.
I've been considering weather or not it would be a good glyph on fights where the majority of damage is physical, the reason being that our self healing is increase by 30% whilst Guard is active, by glyphing it where there is little to no magic damage, you are ensuring more uptime and there for increase your self heals. For it to be worth it, the 30% increase to heals would need to out weigh the loss of Guard shields throughout the course of a fight. I'm not sure how to calculate this without the use of logs. If anyone with logs is able to post or give the following values it would make calculating it alot easier:
- Guard uptime without glyph
- Amount absorbed by Guard
- Healing from self heals (Expel Harm, Zen sphere, healing spheres (proc ones not cast ones)
- If possible Guard up time with glyph, although not essential as it can just be calculated in the form of required uptime of guard to make the glyph worthwhile
The alternative would be some napkin math based on some recount/skada token values from a raid if anyone has them, if it turns out not to be close then the logs will not be needed. I suspect it will be marginal at best but it's worth checking just in case