Emperor Palpatine vs. Lord Voldemort

We've seen in books how hard a wizard can hold on to their wand (and other objects) even when it's being pulled out their hand with some force.

The disarming charm has ALWAYS disarmed a person. It also seems to knock them off their feet most times.

The summoning charm Bellatrix used on Harry to get the Prophecy were never completed... She started but was cut off and he just barely managed to cling onto it then.

Add to that the fact that whilst he still holds the wand, Voldemort can cast a spell to disable Palpatine and interrupt him mid flow.

Uh...no one in HP is exactly above-average in athletic speeds. They certainly aren't doing Yoda moves. Yet Harry and the rest can dodge spells. You're telling me Palpatine won't be able to get around most anything Voldie casts?

Indeed, Voldemort could then Accio Palpie's Lightsaber and take away his main hand-to-hand weapon.

While he's doing that...he's getting turned to extra-crispy wizard by Palpatine's Force lightning.