Couple more newb questions

I know different slows resist check against different resists and AE slow has its obvious use, and i realize that cast time is important but..
1)In practice, do you use different slows based on cast time or resists?
2)Can my heal block someone elses heal? I have heard healers talking about heal rotations
Have mercy on me, main is melee without a yellow bar.
1)In practice, do you use different slows based on cast time or resists?
2)Can my heal block someone elses heal? I have heard healers talking about heal rotations
Have mercy on me, main is melee without a yellow bar.