[Snake]

It's a fun skill, fun theme, but it fails to deliver what it preaches, so please make it a little stronger without going overboard.

Dhessence

Create a vitality-stealing burst of darkness that hits 1 enemy within 5 range, dealing Dark magic damage to them. If it hits, you recover HP (based on Rank) and half of their Scaled VIT. If the target was weak to Dark damage, you recover 50% more.

If this skill defeats the enemy, your gain Stolen Essence for 5 rounds.

(Stolen Essence increases the Power of your next Healing skill or spell by LV (LV = Defeated Enemy's Scaled VIT * 2). If the battle ends while this is active, it is consumed to heal your own HP/FP instead.)

Speaking roughly numbers, this may make it heal a MAXIMUM of either...

31 VIT ~ 10 + 15 for 25 HP heal on squishies.
40 VIT ~ 10 + 20 for 30 HP heal on average.
55 VIT ~ 10 + 27 for 37 HP heal on tanks.