I'm really glad you mentioned JoyMouse. I might very well use it, but I still can't use two joysticks in one hand o_0. I was thinking maybe a joystick with a 4 or 8 way hat switch might be able to be used to control movement of my 2nd character, not as well as primary, but good enough to do basic positioning, so I can keep my other hand free for a gamepad.

Other option is dual joysticks, but this limits me to the buttons on them, and requires me to find one with right and left handed versions...

Same problem for dual mice.

Been thinking about this for awhile and I'm not much closer to a decision than when I started.