I know warp saved me a few times in FFII, when I'd beat the boss in that dungeon, and I'd be so mashed up I'd have to warp ot or some random battle would kill me. And I always seemed to run out of pheonix downs/potions/mp for life/cure spells after bid boss battles. In FF6, there was a part in Zozo where I was so mashed up If I had got practically 1 random battle I'd have to go through th whole shebang again.