Mo's has got to go after a fast time for his legacy. If Mo wins the double next year, this would give him the most global championship gold medals behind only Bolt and Carl Lewis and number one among distance runner. But, no matter how many medals Mo wins, being the GOAT will always be in dispute if he does not at least run some top-10 times.
It is going to be really tough, to get either one of the records. My first instinct is say go after the 5K because of his 1500 credential, but besides that fast 1500, he has not done anything else to suggest he could even come close to the record. I think Mo's 5K PR is 12:53 and most of his 5ks have been 13+, when KB set the record, he had run several 12:4x 5Ks and ran sub-13 is just about any circumstance. I can't understand why Mo has not run faster and his 3K PR is not super fast as well. I think the 10K is off the table because Mo has not shown greatness in XC or the roads, I just don't think Mo is or ever will be a great long distance runner. The main problem I see in the 10K is the need for pacers, not only are there only a few athletes capable of pacing a 10K WR attempt, the ones capable of doing it would like beat Mo and probably have no desire to do him any favors.
I think Mo can certainly run much faster in each event, but I can't see him breaking any records. Btw, training to break records might be at the detriment of winning races the way he does.