I live in this mystical dream world in which Palpatine is the simultaneous leader of two galactic-class factions, micromanaging a war between those two factions, and arranging the seduction of Anakin Skywalker, eating up a substantial bulk of his time.
You forgot to mention he also has time for Sith rituals and going to the opera.
If I were to concede that Palpatine was truly decades out of practice by the time of ROTS, then by George; at the top of his game, that guy has to be the greatest swordsman of all time.