Humans can define what the word omnipotent means.
If defining omnipotence as the ability to do anything except --->
insert exemptions here<--- helps remove supposed 'incoherence' (ie the stuff we can't mentally process) then just do it. Simple.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Problem solved. Then you can call God omnipotent and sleep easy at night.
But please don't accuse God of lacking the omnipotence which you yourself defined. Don't frame gotcha questions like...
can God be simultaneously impotent and omnipotent and then no matter whether the answer is yes or no you pounce on the supposed incoherence of the answer. It's
your definition of omnipotence which is flawed.