Resource Variable Schedule

Hi everyone, being new to Omniplan one of the first issues i found was entering variable schedules, i work in a lab and my team helps me with many projects but being that the staff of 12 has different day schedules not to mention shifts too and i cant place them on a set schedule on omniplan, i wanted to use omniplan to help me distribute tasks among many or a few and be able to see when can it be completed or if not reassigned, i asked support and they took in my request, so far i only found this doable in the Mac version with off days schedules but hard on IOS.

Has anyone else encounter this hurdle? how have you manage to lever omniplan?