Virtues I use

Standard Setup:

Loyalty
Honesty
Justice
Valour
Empathy

This grants my minstrel (all virtues maxed out):

Armor +870
Max Power +185
Max Morale +519 (vitality bonus already figured in)
Fate +23
non-Combat Morale Regen +676,9
Vitality +30
In-Combat Morale Regen +60
Fear Resist Rating +609
Might +8

I like the extra resilience of this setup. Armor, Max Morale, Vitality & In-Combat Morale Regen all keep me alive. Max Power is alway good as a minstrel, and Fear Resist Rating is a nice bonus.

I also maxed the following virtues out so I can use them if necessary:

Fidelity (for shadow defence; also vitality and max power)
Honour (for shadow defence; also vitality)
Confidence (for fear resist rating; also will)
Idealism (for fate and fear resist rating; also will)

Maxing the above mentioned virtues out gives me access to the maximum possible bonus of:

Armor
Max Power
Fate
Vitality
Fear Resist Rating

Also, I have access to the two highest boni of:

Max Morale
Shadow Defence

These virtues allow me to customize my minstrel for a variety of situations.