Looking for hot-shoe flash triggers for Olympus

[PropilotBW]

I have the Olympus EM5ii, with the Olympus FL-600 flash and the Yongnuo 560 IV.
I have been triggering these flashes with the small on-camera flash. Sometimes in poor lighting situations, it doesn't fire. It's frustrating and embarrassing during a shoot. I'm looking for a better way to trigger the off-camera flashes.

What type of triggers/receivers are you using for the Olympus?


Thanks

 

[ac12]

Any of the many RF slaves.
Watch out for the cheap ones, as they may be fiddly and not perform well/reliably.