Please check Word of Glory - Spell - Ask Mr. Robot formula.
The current healing value does not agree with the numbers from the game.
In this sim Simulation Report
On 25.859 time we have 24k hp (42%)
On 26.269 we use WoG which healed the tank by ~13k
But if i test this case in game i have ~ 17k healing.
And this value corresponds to a multiplier of 2.5 in the WoG formula instead of 1.5.