I've been using this for a while but forgot to share it here.

Before the fight, buy and equip the cheapest machine gun (uzi) without upgrades. A single bullet from it is the weakest shot of all the weapons in RE5.

During your fight with Jill, Aim at her chest's device and shoot it one bullet at a time, never use the uzi like you would a normal machine gun, use it like a hand gun and hit ONLY the mind control device. If you miss it's ok because the uzi bullets are so weak it's almost impossible to accidentally kill Jill.

Every time you shoot jill she stumbles back allowing 2nd player to grab her or after a few shots she falls down or freezes and can be thrown down and you can rip it out little by little.

It's very easy and quick.

My way of taking it off quick in most difficulties is to shoot it with a sniper rifle, it's risky but it does it quick. I think even tried out the magnum and desert eagle lol

flash rounds with G launcher and throw, AI partner will shoot it , after a while , you should be able to rip it off, ONLY shoot the device with a pistol , since all guns do same damage

Seriously? I want to put that to a test! Using the strongest Sniper in Easy.

This is old. I already knew about this since I've played the professional mode. I figured it out then.

Ever flashbang Jill as she's running up a wall? Hilarious and sexy at the same time.

But yeah this is way old.

The number of shots of snifer is limited. Cause she might died mostly in normal and veteran mode. But in professional I almost shot her 9 times and still she struggles. But when I make it 10. I finally take the device off of her chest. Whooo, piece of cake.

It only takes a few bullets with a magnum I think, and if she dies I don't mind doing it again cause it's just that fun XD

Nah, it's just cause when I get a random player he/she instantly knows what to do. Baring in mind it's in Professional, and when they don't I just teach them.

They can shoot it with a pistol or whatever whilst I shoot with the rifle or magnum. Whilst they're prying the device off of Jill's chest, I hover over them just in-case they miss the buttons. Once that happens I spray them with a herb And so forth. It's only really fun to time her moves so you can grab her.