Depends on the effect you want to archieve..
In a style, it works well to pan all voices differently..

Also have a look if your keyboard supports stereo spread for stereo voices..
Adding more spread makes the sound wider, works very good for strings..

For natural sounds just listen to real bands, groups etc. to see how sounds are mixed and panned and take your cues from there.
For artificial, (Electronic etc.) just go for the mix that sounds right, and make it your own.
Don’t be afraid to experiment which ever music you are creating, as it’s the only way to stand out from everybody else.

Bill

Sounds Thay Work Well With Electric Piano Sounds ?

MM,
Bill is right, listen to the music that you want to sound like. Watch You Tube. Here’s where you become inventive. Here’s where you become you.
My friend, a sax player, creates guitar sounds that he feels are great. I feel that they are fair. (I play guitar) He dislikes the sax sounds I create. Everyone hears differently. Do YOUR THINK.

John C.

Try combining a wurly and a rhodes..
Or ep and acoustic piano..
Ep and acoustic guitars..
Or add a bell sound to the ep..
And then there is ep and brass, works well with brass only at higher vellocity active

Eps are kind of neutral..

Personally, i like adding several DSP effects to the EP.. which works even better then layering

So I recorded a couple of songs on my Pa700 using with a couple of combinations of sounds.

The first is Danny Boy

https://soundcloud.com/nativeangels/danny-boy

The Second World In Union

https://soundcloud.com/nativeangels/world-in-union

Thanx for sharing your songs with us.

Happy New Year

MusicalMemories ... thank you ...
Of course all of this is subjective opinion, but personally, on "Danny Boy", I would have the 'crystal' or 'synth' voices deeper in the background ... BUT, that's just me ...

I have often used an 'Ooh Voice" or a 'Scat Voice' with a Flute or Guitar (Acoustic or Jazz) for a nice effect on swing tunes or bossas ...

Tony, the best sounding scat voices were on Technics keyboard.
They still sound good.

John C.