Due to using backing tracks and synth patches with arpeggiation and rhymic movement we have started playing to a click track live (at the moment we are drummerless ) and using a basic in ear solution. You know what it's tough. Definitely a skill to develop.
Only the musicians are using the click the singers aren't and they are in experienced singers so often drift in their timing regardless of us, making staying on the click even harder!!!
Please feel sorry for me!