Personally I don't see the advantage of )}]]})} over ))))))).

kazinator · on Oct 5, 2017

It's more time consuming to close )}]]})}. With ))) we just repeatedly type ))) until the cursor jumps to the target opening paren we are trying to close. With a mixture of different parens we have to interrupt what we are doing and determine the correct parens which will continue the closing sequence.

flavio81 · on Oct 6, 2017

>With ))) we just repeatedly type ))) until the cursor jumps to the target opening paren we are trying to close.

Exactly.

Or, the IDE can close all the parens for you: SLIME command "slime-close-all-parens-in-sexp", which you can map to whatever key combination you want.