User blog comment:Joeaikman/Fourth Official ERB Wiki User Hurt Heal Competition/@comment-31278711-20170326050522/@comment-25170157-20170326062254

"No double heals are allowed for people over 25 health, meaning that people are encouraged to targetting those on (ridiculously) high health points. Heals must, therefore, be split up if one of the parties is over 25 health."

Since Grav is currently on 37 HP, you can only single heal him and somebody else of your choosing.