I duo with my wifes bard on a daily basis. Bards work extremely well with a mage, but to work best, the mage pet needs Pet Affinity.
The bard can pull anything single. Can mez adds with songs or an AA, damage shields, songs to improve spell damage, AA's to improve spell damage, haste for the pet, 53% slow, snare and probably a couple of others I am not thinking of right now.
Can kite mobs while you let the rogue pet tear it up and the mage nukes.
I have duo'ed with many classes and well the bard may not be the best, the bard definitely ranks up there.
With a healer merc, there isn't much we can't take down.
Your 85 songs and even some below that are still useful.
85 - Aura of the Poet - We use for the spell damage increase
84 - War March of Brekt - but mainly for the DS, STR and ATK - don't use it as much, depends on if we use a merc and my wife melee's with her bard
84 - Druzzil's Psalm of Potency - Magic nuke focus
84 - Dance of the Dragorn - AC and some spell/DS mitigation and chance to resist spells - specific to use when they are casters nuking you and pet
83 - Talendor's Aria - Fire nuke focus
83 - Aura of Rodcet - Adds a little dps to melee attacks
82 - Dirge of the Fallen Rathe - Spell/melee mitigation
81 - Aria of the Poet - overhaste, spell damage increase
81 - Cantata of Rodcet - health/mana regen song - best in down time
Those are some of the songs we use daily depending on the mobs and their makeup.
There are also a whole bunch of AA's that are highly beneficial to a mage or the group itself.
Fierce Eye - increase chance for melee/spell critical
Dirge of the Sleepwalker - 1 minute mez every 10 minutes roughly, can stack mobs waiting to be killed
Cacaphony - can interrupt spell casting of the mob, great for those healing mobs
Funeral Dirge - weakens the mob, increases damage the mob takes, after 30 sec it does some decent damage to the mob
Song of Stone - summons up to 6 pets, good for Shock/Jolt line
That is just a brief run down and I am sure others with bard experience can elaborate on the topic.
The bard can add so much versatility and can help you adapt to different mobs.
My wife is no uber bard gear wise, but it is really the songs and AA's that make the bard as with most classes.
find someone on your sever who is a bard and go hang with em. Test of the song combination's.
Don't tell, but I love the fact we can run anywhere invis and bard speed!!
With creative usage of the bandoleer and /melody command, you can adapt to changes in the battle very quickly.
My wife's bard so you can see what she is at and can use to compare maybe?
http://eq.magelo.com/profile/1149066