My advice to Trump would be to avoid this reaction nationally during the debate. You wanna win but don’t overdo it if he’s really digging his own grave himself on Tuesday (for what it’s worth, I do think Trump knows where that line is actually)
My other advice would be to try his best not to have his own senior moment (or what looks like one) for the media to hold up & say “see: they’re both senile in a way.” Draw a stark contrast (no mad libs style talking, just for that night)
If Biden’s meds appear to be working & it looks like a fair-ish fight, then yea: go for the jugular/start swinging.
I think by the half way mark at the latest it’ll be clear which scenario Trump finds himself in. Act accordingly.