I use E6000. It is somewhat flexible, and forgiving. It dries clear.
Being solvent based, it takes a good hour, or more, to fully harden.
It takes acrylic paint well, even without primer. It adheres with a fairly strong bond to most plastics, including the stuff Army Men figures are made of: I use E6000 solely, to adhere my plastic Army Men figures to MDF bases; they can be peeled off, but it takes a bit of effort -- more than a casual tug!
I use it with my other plastic, Reaper Bones, metal, and resin figures, both to bond them to their bases, and to assemble them. Note that it is quite thick/viscous, so apply it sparingly, for assembly jobs, as well as base mounting. Wipe away any excess immediately, to avoid tearing it off later (similar consistency to rubber, when hardened), and possibly breaking the bond in doing so. Cheers!