It looks like the Phottix Odin and Strato triggers are only available dedicated, so you're seemingly out of luck to get a non-camera-specific Phottix trigger.
The easiest option is to use some masking tape and tape off the pins other than the center pin and see if the trigger will play nicely with your Olympus. That'll essentially make it a dumb trigger that simply fires the flash signal. You'll lose TTL and HSS, but you said you're not interested in these. It does depend on whether the trigger will be happy working with a camera with the data connections disabled though.
Other options are to consider a Cactus V6 II used as a format converter, with the Phottix trigger stacked atop. Your camera will talk Olympus to the V6 II, and the V6 II will talk Nikon to the Phottix trigger. Not expressly supported by the manufacturer, but lots of people are making similar setups work.
You could also use any wireless triggers with a receiver on the flash hotshoe, but you'll lose remote power and zoom control.
The other option is to use a V6 II as a trigger again, but then use a V6 II receiver connected to a supported flash (which can be Canon, Nikon, Fuji, Metz, etc.) and get full control that way. Or use the Cactus RF60x flash which has a built-in radio receiver so you'd only need the corresponding transmitter.