Honestly in wild it’s more about flame trap, any minion to test for flame trap would likely have died anyways, but i mean using a 3/4 to test or a spare 2/1 never hurts, then you can decide where you want to put the meaty minions. Just so happens playing around vaporizer and a bit of flame ward are the same interaction though. Plus random generations and the rare, but sometimes cast 2 random spell card or discover i suppose.