Sharing my best tips so far, may not works for everyone since our canals are unique.
The real Best of two world is here!
JVC spiral dots known for producing best sound, wider soundstage, reducing harsh peaks, and cut mid bass bleed, however for some people its isolation isnt the best to offer.
I got idea from my sony hybrid, and I bought symbio W also, took out symbio W orange memory foam and put inside JVC spiral dots, works quite good actually but a bit stiff.
So i got my spare comply memory foam S series, the one with wider pore. cut it, and put into JVC spiral dots. The result is amazing!! you got the best from JVC spiral dots with extra isolation and extra fit but not too tight and smoothly molded to your ear canal shape.
Here my tutorial with picture :