When I'm running PoE for the 30th time I want to get it done quick so I like to use the bubble shield/Gjallarhorn tactic. It makes the bosses, which I've beaten 30 times already, dead in 30 seconds. The thing is you don't need 3 Gjallarhorns, 2 gallies and another rocket will do. Debut depending on the nerf, it could well be a situation where you do need 3 Gjallarhorns to do the quick strategy.