Completing and turning in a single leve will now reroll the options at the desk. So I usually keep doing in city leves while picking up two target camps for two crafting classes. This will usually let me do 3 or 4 leves in city and turn in 8 more at my two target camps.

I then also grab some battle or fieldcraft leves for those same camps.

Edit: To do this I also include r30s since they still give a very nice SP bonus.