Any gearing guide?

Hello guys. I wanna try healing in PvP as druid (and Maybe try some moonkin stuff) , but i do not understand my gearing priority. My Last PvP season was tww s1, so i know the basics about weapons and craft, but i still have some questions.

1. Do i need a separate PvP set of should i use this imbune with PvP power thing on my PvE set(i have infinite catalyst) ?

2. Why every top players only have 2p bonus?

3. What do i craft? Do i care about quality of crafted gear of i can go with lowesr quality?

I tried searching icy veins, but all they have is a general guide and no answers for my questions. If some one could link a pretty in depth guide or answers my questions i will be very grateful.