Opal Orb vs. Scholar Runes vs Ruby Orb
Scholars beat them all.
If you are interested in maths and optimisation, take a look at my calculator:
https://forum-en.gw2archive.eu/forum/professions/elementalist/Zelyhn-s-Advanced-D-F-PvE-Guide/first#post2333478
(chapter 9 of my guide)
Zelyhn.8069 [rT]
Retired elementalist theorycrafter
Retired elementalist theorycrafter
Thank you for that!