I have a level50 Paladin, and have some trouble using the cover skill. I play on a PS4.

I usually "tumbling" around with switching to the right partymember by using the up/down on the Dpad, and in time when Im done its usually too late. I would appriciate advise on this, and have the following questions:
1. Is the skill usefull at all?
2. Is it any macros I can make to automaticly use cover on the partymember who is stealing hate, being attacked, etc.?
3. Am I just gonna get used to switching partymembers by using the Dpad?

Any tip and advise is much appriciated! XD