Don’t do rail Europe.
Your safest bet would be Milan Central return to Rome with ‘Italo’
From Milan Train station allow your self time to get to the airport by bus/taxi.
Also in Rome Italo doesn’t always stop in Termini and has 2 other stops in the center
Roma Tiburtina and Roma Ostiense
@Hotchilidog - Italo Trains are the high speed(private) trains.
Even when there is nationwide strikes most of their high speed trains still usually go ahead.
In Italy it’s possible. Atleast 1/2 every month!
The strike is on March 8th and nearly always nationwide strikes are on Friday here.
Regional strikes vary.