Just dropped a nuke test with SSJ4 Goku against Omega Shenron. The rotation and damage is in the images below.
Basically I had dokkan mode ready, 2 SSJ3 GT Goku nuke leaders (as you should), and the GT Link active which gives bonus damage against the Omega Shenron event. Only thing which would have provided a little bit more damage would be SSJ Cabba in rotation but I don't have him and honestly don't really care lol. The Godku gives a 25% passive attack boost already so that's good enough for me.
If you guys have any questions about how to do a nuke or if you just wanna post your own nuke test on here, feel free to as I'd love to see them!