Although it certainly outshines Gjally on the lamps, on Ir Yut and Hallway, Gjallarhorn also one-shots shriekers at 331, and it melts Ir Yut too. (I can solo Ir Yut as a level 31 Titan with Gjallarhorn). So all in all, although Dragon's Breath isn't as inferior to Gjllarhorn as many think. Gjallarhorn is still better overall. This is kind of unrelated as well, but Using Icebreaker or Black Hammer on Aksor, the Archon Priest, is amazing. You can just literally stunlock him with headshot after headshot while your team takes him down. (Your mention of strike bosses brought this to my mind).