It's good at the start of a pull before everyone unloads their buffs because it means their buffs will be back up for use sooner, but other than that it requires a bit of coordination to use affectively on others because you don't know when they'll use their abilities. I've never really made intentional use of it on myself, but I could see using it before luminiferous aether to get that back up quickly. Also maybe Lightspeed and Essential Dignity, but timing it on those in a practical way (since they're situational skills and cards are RNG) would be difficult.