Originally Posted by
Raminax
From what I've seen, Esuna just simply doesn't consume mana every now and then, rather than getting some buff stating that the next Esuna is free.
As for Leeches, the idea I like the most if it had a secondary effect similar to Astra/Veil from other FF games. Works like a plain Esuna, but if it doesn't dispel a debuff, it will instead place a shield for X seconds that will prevent the next debuff from affecting the target. Feels a bit in line with the Scholar's toolkit of prevention and mitigation.