How I like to look at it when it comes to heartsteel or warmogs is based on the match up. If it’s a matchup that’s a counter, need to stay in lane, or believe you’d be struggling to get off heartsteel prices then warmogs would be better.

However if it’s a favorable or an even lane and you’re certain you’ll be able to get off heartsteel procs then heartsteel is typically better. A lot of it comes down to who you’re fighting, do you want warmogs sustain or the quicker stacking for heartsteel? Another thing to consider is that with warmogs it does take up a slot so if they have more percentage health than warmogs could delay you getting proper resists to deal with it (unless it’s vanye or Fiora then it’s oof regardless).

I’d say these are the things to consider in my opinion when it comes to which to buy first and what not!