So you are free to do as you want, I say it now I only give advice and are not absolute truth.
But in LE it is not worth having too much element, it is often more profitable to have a Maximize type of damage, than to scatter it.
Also most of the unique ones (not all) are not optimizing, they are useful but often an object given to you a minimum optimizing will be much better. So personally I totally advise against having too much unique in your stuff, and scattering over too many types of damage at the same time.
Similarly to know disintegrate does not damage or very little, it is especially lightning blast which does damage. So it is counterproductive to seek too much disintegrated booster. So that in case you play lightning blast you maximize the lightning damage, or the damage during the channeling.
Because it will give a little boost to your disintegrate, but especially to your lightning blast which is your main DPS spell.
I know it can be frustrating but a build or disintegrate is your main DPS spell is impossible, it doesn’t do enough damage and can’t crit.
So in general, as in this construction, it is used to channel other spell at the same time, or it goes out on sickness break (burn) but in both cases it is not this spell that does the damage.