I bought one set of Elixirs, the coating peeled within days and hardly lasted longer than power slinkys for twice the price. This was over a decade ago and I never bought another set, but some googling reveals that it seems to still be a really common issue. Others seem to love them so who knows. Expensive strings seem like snake oil to me. In my experience string breakage and wear issues come down to technique and cleaning as much as anything. Nothing fancy, just wipe your strings off before and after playing, especially if you life in a swamp, and don't be a sledgehammer all the time. I use D'addario because I like how they're wound, but I've never been let down by Ernie or Curt either. Strings "going dead" isn't something I have ever concerned myself with. A string is dead when it breaks. I save all the old ones when I do a full swap at cleaning time or before a gig/recording, and if I break a string during practice or jamming I'll use one from the string graveyard instead of a new one. Saved me a lot of money over the years. Find something that works for you and don't give it another ounce of thought unless or until it stops working. There are way more important things to worry about.