I use spam PoH alone in the final phase of the Trial of the Champion Black Knight fight, as well as for the ghosts leading up to the Keeper of Souls boss in the Forge of Souls. Easiest counter to infrequent yet significant group damage when the party is mixed between melee and ranged (i.e. PoM wouldn't help, and CoH doesn't have the range).

Back on the point of the article, I view the Inner Will & Leap of Faith spells as addressing quality of life issues. I can imagine using Inner Will when I don't need big heals (spellpower), and want to run around spamming Renew and PoM... it screams "use me for highly mobile fights", and it's not like it's required - just that it makes it easier. Life Grip is the same - stupid DPS players are stupid, and I can't recall a Brann Bronzebeard fight in Halls of Stone where I didn't get sick of spamming heals on the person standing in the red lazers... yanking them out would reduce my stress levels significantly and allow me to put my GCDs to other better uses. To hell with what the other players think about whether I use it or not.