Give EK another new skill to infuse all three elements that is unlocked upon reaching Link 10.
Whenever a player is knocked out, the elemental infusion is removed and its quite a bothersome to activate all three again in the heat of the battle. Even while preparing for any content it is required to click on all three separately, me personally have them on another skill bar on 1, 2, 3 to speed up the process but still have to change back to my main skill bar; and since the stamina consumption is quite high, the ability to turn them all on and off whenever required would be a huge quality of life, I believe it is something that is required since once you unlock the ability to infuse all 3, just using 1 or 2 out of the 3 while having the option to use all 3 is quite strange.
Give it a flashy animation, make it feel rewarding for having it.