You can Solo farm in Warehouse so far you have maxed SD Chest and Leggings, +10 conqueror level will give you additional 20% SD that will help you survive well in there.
Be warned that you need a 8hr permit to kill mobs so if your permit expires an your in HK you will die because you wont be able to kill the mobs or even attack at all.
Wizard should be good to play there only problem is you need an upgrade staff cause mobs will punch you really hard.
GL!