Keymander not working with my ps4
I don't know much about the ps4 but I can help you as much as I can.
What keyboard and mouse have you tried, is it on this page?
KeyMander Compatible Keyboards and Mice
Which Controller are you using? Ps3 or ps4. Are your profiles on the ps3 controller instead of the ps4 controller?
Yes you can set a macro to use multiple keys at once by going into keymander software pressing on a profile and pressing macro.