Does Jack's skill merger work with any laser

I have only seen info about merger and excalibastard but I was wondering if it works with any laser

It works with anything that has a transferable special effect. So anything that’s works, in say Salvador’s off-hand in terms of transferring special effects, is good. That being said, nothing really beats the Excalibastard, as you get the 110% crit from the gun, and CC/200% from the cryo status effect.