If you are looking to gold farm = more accounts the better gold per hour you will get, pick up herbalism or mining on all the characters and just keep on farming. You can pick up same node up to 10 accounts at same time.

For PvE you can go with 5 BM hunters If you like to play solo or go with 3 and have some friend tank and healer to go with you do mythic dungeons and such.

Just so you know you can get Legion for 27-29 euro per account from like any website rather than blizzard which is 45 euro right ? http://www.allkeyshop.com/blog/buy-w...ompare-prices/ here you got some websites.