About a year ago, adjustments have been made with the Chivalry skill. There is a chance of failure in "Concecrate Weapon" unless you have skills more than 80. The amount of damage bonus of "Enemy of One" is dependant on skill level. The amount of stamina replenished by "Devine Fury" also depends on skill level. If you are dependant on those spells, I would increase chivalry to at least 80 by means of accessories (braclet and rings) or by reducing tactics. However, I would first "test drive" your sampire, and if you feel comfortable with it, there is no need to adjust your skills.