i recently aquired my abilty to have a sub job now i have a couple questions on this matter...

1. after i have chosen a sub job is there any way to take it back off without picking a differant one? like can i go back to only having one job...
2. my main job is going to be whm...i am currently leveling theif in order to use it for farming...is there any other non common combonations anybody would suggest...i mean you see far too many whm/blm or whm/rdm or whm/sum its enough to make me queezy...