I have a hard time to make a mouseover battle res (Rebirth) macro for druid. For all my spells I made it right only for this I can figure out how to make it so I dont need to click on target with mouse after I press my keybinding for it.
The help conditional already implies the exists conditional so you never need both. That is most likely not the cause though, I can’t test with rebirth as I don’t have a druid but I use
for casting pummel at my mouseover if I have one and my regular target otherwise.
For troubleshooting I would advise to start with the simplest macro possible and extend from there. Start with a spell you can cast on guards and begin with just
/cast [@mouseover]Rejuvenation
and extend it from there with extra conditionals. Test it at every step and eventually replace rejuvenation with rebirth.