Spec Help

ok so i just got into boxing and well i started with the traditional shamx5 group ended up being shamx4 cause i got boosted with my raf so now ill just wait and bring up the other sham later

im working on a second group ill get boosted to 51 then probably switch and make 2 more groups on the alliance side since im on my 2nd week of raf and already have the (5)51 shaman and the second group is 40

classes in the 2nd group
warlock 1
warlock 2
warlock 3
priest (disc) but i can change this if anyone thinks of a good spec and i wont need to be a full time healer at 80
mage (fire) figured the big damage dealer would be a good idea

currently all the locks are destro but would it be better to have 1 demon or affliction sample specs would be good as i have never played these classes before