to the person that said 3min timer on swift cast... Wrong.. its 1 minute.

Second, if it works for you keep doing what you are doing. However, having cross class abilities just gives you more to work with. I use swiftcast a lot. Sometimes for utility, sometimes for necessity, sometimes even while dpsing (second boss of WP the adds pop out on a basis that means I can swift cast + holy them right as they come out).

Eye for Eye is not NEEDED for WHM, but nice to have - does more for scholar if I remember right from traits, but still nice little buff to have.

Its not so much about what you NEED as to what makes you even better.