1) Get a campaign farmer that can solo Brutal 12-3/12-6 in under 30 seconds. That's priority number one

2) Get a team that can farm top chest on at least Brutal CB

3) Get a team that can farm Dragon 20

want  help  with  a  cb  team

Dragon , Dragon and more Dragon.

keep progessing in Dragon until you can do 20, this should help in all other areas at the same time.

Dragon has life steal, speed and Acc Gear.

Dragon 13 is the first step , you first chances at 6* gear but keep working up to 20 were you only get 5 and 6 * gear

 I definitely agree that the top priorities are farming Campaign + Dragon and building a Clan Boss team. Something I waited too long to do was masteries. It's a really arduous grind to get tier 6 masteries on your first team if you aren't buying them with gems but it's so worth it. With lifesteal gear and War Master/Giant Slayer masteries any reasonable team can reach top chest in Nightmare Clan Boss. My team is 2 epics and 3 rares with half the team power of my clanmate's teams that are full of legendaries and I'm doing as much or damage as they are.

 As far as energy goes are you able to do all the advanced quests? That's 150 more energy per day. Also make sure to use the s1mple promo code, that's hundreds of free energy and 3 days of xp boost!

thankyou EVERYONE.  I will try out what has been suggested.