for example: Mace of Spiteful Retribution has a Sympathetic Remote Healing Blessing II. Sympathetic Remote Healing Blessing II Not a player spell: Clicky, NPC spell, Proc, etc. Slot 1: Cast on Spell Use: Remote Healing Blessing II (Base 10% Chance) Variable chance to proc: Spell Cast Time 2s=2.5% 3s=3.34% 4s=5% 5s=6.68% Slot 2: Limit Type: Detrimental Slot 3: Limit Min Mana Cost: 10 Slot 4: Limit Min Level: 70 Slot 5: Limit Combat Skills: Exclude Slot 6: Limit Effect: Current Hit Points i'm guessing no, but maybe with insult?
My guess is no. Bard "mana" is not really mana. It's kinda a cross between endo and mana but doesn't really count as either. Being almost nothing in the game effects bard "mana", I'd venture to guess it doesn't meet the requirement for Sympathetic procs which is > "Slot 3: Limit Min Mana Cost: 10". It doesn't matter what your casting being DD or DoT or whatever, it has to cost at least 10 normal mana for the proc to work. Poor bards are excluded from many things because of this.
Here's an item on the issue tracker for Sympathetic DD procs: https://dgcissuetracker.com/browse/EQ-681 The submission could probably be expanded to all sympathetic procs or a new submission could be made.