The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Don't need to multi-class, the monk can use any weapon he is proficient with as an implement.
I've done the staff in one hand and dagger in the other before. It always felt like meta gaming, anyway the benefits I'll get from Staff Fighting outweigh or equal the dagger.