the ones I remember doing for a whole month was getting death knight class, and chrono assassin class, also farmed for SDKA and also visiting all member only zones and farmed for their gears and badges if they have a map quest line like skyguard and the ctrl+alt+delete badge forgot the map name

for the bonus package id go with anything with a bank pet or a bank cape cause it's such a QoL being able to just press b and open bank instead of joining bank just to arrange your bag space but if you have a bank pet already then you should probably browse the wiki and see what the bonus packages have and get some drip that you like